Frequently Asked Questions

Which Roomba model has the best navigation?

Higher-end models like the i3, i7, j7, and s9 use camera or lidar mapping to clean in neat rows and allow no-go zones, while budget models like the 600 series use random bump-and-run navigation.

Does the Roomba j7 avoid pet waste?

Yes, the j7 (and j7+) has a front camera that detects and avoids pet waste, cables, and shoes, while earlier models like the i3 have no obstacle avoidance and will smear pet waste.

Is the self-emptying base worth it for a Roomba?

Yes, models with a ‘+’ or ‘Plus’ come with a self-emptying dock that empties the robot into a bag you change every month or two, saving you from emptying the bin daily.

Can a Roomba replace a full-size upright vacuum?

No, a Roomba is designed for daily maintenance cleaning, not deep cleaning, and the article says it is not for you if you hope to replace a full-size upright vacuum completely.

Why Roombas Confuse Everyone (And What You Actually Need)

If you’ve ever stood in the robot vacuum aisle at a big-box store or spent twenty minutes scrolling through Amazon reviews, you know exactly what I mean. Roomba has been around forever, but the lineup now reads like a secret code: i3, i7, j7, s9, Combo j7+, and on and on. Everyone I talk to at the school pickup line or on the parent group chat asks the same questions: Which one do I actually need? Will it clean up after my kids? Why is one model four times the price of another? I’ve owned half a dozen Roombas over the years—some given to me for testing, some I bought because I made a mistake. I’ve also tested Robot Rock, Shark, and Eufy. So let me cut through the confusion and tell you what you actually need.

Key Specs and Features That Matter (And Those That Don’t)

Most Roombas share a few core features: a spinning side brush, two rubber extractor rollers (no more tangled hair), and a dirt bin. But the differences come down to three things: navigation, self-emptying, and obstacle avoidance.

  • Navigation type: Budget models (like the Roomba 600 series) use bump-and-run navigation. They bounce around randomly and eventually cover the floor. Higher-end models (i3, i7, j7, s9) use a camera or lidar to map your home. The mapping ones clean in neat rows and let you set no-go zones.
  • Self-emptying base: Models with a “+” or “Plus” in the name come with a self-emptying dock. The robot empties its bin into a sealed bag inside the dock. You change the bag every month or two. This is a huge convenience for busy parents. If you don’t get a self-emptying model, you’ll be emptying the little bin every single day—sometimes twice.
  • Obstacle avoidance: The j7 (and j7+) has a front camera that detects cables, shoes, and even pet waste. The s9 uses a combination of sensors but can still eat a sock. The i3 has no obstacle avoidance—it will push over a Lego tower.
  • Suction power: The s9 has the strongest suction in the Roomba line. It’s significantly louder, but it picks up ground-in sand and cereal dust better. The i3 and i7 are quieter but still fine for most homes.

Sparkles, my seven-year-old, once named our i7 “Ricky the Roomba” because she said it “sounded like a sneeze that kept going.” She’s not wrong.

Who Is a Roomba Actually For?

A Roomba is for you if:

  • You have hard floors or low-pile carpet.
  • You’re okay with the robot running daily (or more) to keep up with crumbs.
  • You don’t mind picking up small toys, cords, and socks before you run it.
  • You want a set-and-forget daily maintenance clean, not a deep clean.
  • You have a home that’s mostly open-plan with minimal clutter.

A Roomba is not for you if:

  • You have thick, plush carpet that requires a deep suction.
  • You’re hoping it will replace a full-size upright vacuum completely.
  • You have pets with the habit of leaving “surprises” on the floor. (Yes, the j7 avoids solids, but the earlier models will paint your entire living room floor brown.)
  • You want smart mapping that just works. Roborock and Eufy do mapping better at a lower price.

Pros and Cons of Roombas (From a Tired Dad)

Pros

  • Rubber extractors—no cutting hair off a brush roller ever again. This is a big deal after years of using a Shark and a Bissell.
  • Strong brand with wide parts availability. You can find replacement batteries, filters, and side brushes at almost any big box store. That matters when something dies on a Sunday.
  • Self-emptying is genuinely life-changing. I never touch dog hair. Sparkles thinks it’s magic.
  • Great at hard floors. The two rubber rollers do a fantastic job on tile and wood, getting right into grout lines.
  • Reliable app for scheduling. It’s not pretty, but it works well enough to set a daily schedule.

Cons

  • Mapping is good but not great. It takes several runs to get a complete map, and if you move furniture around, the robot can get confused. Other brands (Roborock) map faster and more accurately.
  • Expensive for what you get. A Roborock Q5 with lidar mapping and self-emptying costs hundreds less than a comparable Roomba. The Roomba price is driven by the brand name.
  • No lidar. Roomba uses a camera (vSLAM) instead of lidar. That means it struggles in darker rooms or at night. It also takes longer to navigate than a lidar-based robot.
  • Customer support is hit-or-miss. I’ve had good experiences on the phone, but some parents I know have been stuck with a bricked robot after a firmware update. Also, replacement batteries are proprietary and not cheap.
  • Still a bit dumb. Even the j7 can get stuck on a rug tassel or a low-hanging curtain. You will still need to rescue it from under the couch occasionally.

Verdict: What You Actually Need

Here’s the honest truth: if you’re buying a Roomba, get the i3+ (self-emptying) or the j7+ (self-emptying with obstacle avoidance). The i3+ is the best value for most families. It maps your home, empties itself, and cleans well enough for daily maintenance. You don’t need the top-of-the-line s9 unless you have thick carpets and a lot of money to burn. And unless you have pets or small toddlers who drop things everywhere, skip the j7’s obstacle avoidance feature—the i3+ will save you a couple hundred dollars and do 90% of the same job.

But honestly? If you’re confused and want simplicity, look at the Roborock Q5+ or the Eufy X8 Pro. They both have lidar, self-emptying, and better mapping at a lower price. Roombas are fine, but they’re paying a premium for the name. I still use my i3+ daily because it works. But I wouldn’t buy another one at full price unless I found a great sale.

Sparkles once asked me, “Dad, why does the vacuum need a name?” I said, “Because it lives here now and it eats our excuses.” She nodded. She gets it.

Bottom line: unless you need the brand name or specific parts availability, you don’t need a Roomba. You need a robot vacuum that consistently cleans your floors and doesn’t make you yell at it. That might be a Roomba, but it might also be something smarter and cheaper. Do your research and ignore the marketing hype.