Frequently Asked Questions

What’s the main difference between entry-level and mid-range Roombas?

Entry-level Roombas use random bump-and-turn navigation, while mid-range models use a camera and floor-tracking sensors to clean in neat rows.

Which Roomba models can avoid obstacles like socks or toys?

The j7 and j9 series have a front-facing camera that recognizes obstacles like shoes, cords, and dog piles, making them useful for avoiding stray items.

What does the ‘+’ in a Roomba model name mean?

The ‘+’ indicates the vacuum comes with a self-emptying base that automatically sucks dirt into a sealed bag, which is recommended for homes with pets or kids.

Are Roombas with self-emptying bases worth the extra cost?

Yes, if you have pets or kids, the self-emptying feature is almost mandatory because it avoids having to empty the tiny bin every other day.

Wait, There Are How Many Roombas? Here’s What You Actually Need.

I get asked about robot vacuums at every school pickup, soccer game, and block party. The conversation always starts the same way: “I’m thinking about getting a Roomba, but there are like twelve different ones and some of them cost as much as a used car. Which one do I actually need?” Then Sparkles inevitably chimes in with something like, “Dad’s Roomba is named Gus and he got stuck under the piano once.” That’s the thing about Roombas — they’re not all the same, and iRobot hasn’t made it easy to figure out what you’re paying for. I’ve owned four different Roomba models over the years (three of them still running, one sacrificed to a barbell incident), and I’ve tested them in a house with a seven-year-old, a shedding dog, and a distinct lack of floor space. Here’s what I’ve learned about cutting through the model numbers and choosing the one that won’t collect dust in your closet.

The Key Specs and Features That Actually Matter

Before we get into which model to buy, you need to understand what separates a $250 Roomba from a $900 one. The fundamental cleaning mechanics are mostly the same across the lineup: dual rubber brushes that don’t tangle with pet hair, decent suction, and a side brush that flicks debris toward the main rollers. The real differences come down to three things: navigation, object avoidance, and self-emptying.

  • Navigation: Entry-level Roombas (the 600 and 700 series, now basically the i1 and i2) use random bump-and-turn navigation. They’ll clean your whole room eventually, but they’ll bounce off your baseboards like a pinball machine. Mid-range models (i3, i4, j5) use a camera and floor-tracking sensors to clean in neat rows — much more efficient. The high-end j7 and j9 series add a front-facing camera that recognizes obstacles like shoes, cords, and dog piles.
  • Object Avoidance: This is the feature that separates “cool gadget” from “actually useful parent tool.” The j7 was the first Roomba that could reliably avoid a stray sock or a toy car. The entry-level models will run over anything smaller than a bowling ball.
  • Self-Emptying Base: Every Roomba with a “+” in the name (i3+, j7+, etc.) has a base that automatically sucks the dirt into a sealed bag. If you have pets or kids, this is almost mandatory — I’d rather spend an extra hundred bucks than empty that tiny bin every other day.

Who These Vacuums Are For

Roombas are for people who want cleaner floors without rearranging their schedule. They’re for parents who vacuum at 10pm after the kids are asleep, then find cracker crumbs at breakfast. They’re for pet owners who are tired of wearing dog hair to work. And they’re for anyone who’s ever said, “I don’t have time to vacuum today.” But not every Roomba is for everyone. If your house has lots of low furniture, thick rugs, or rooms with dark floors (which mess with the camera navigation on some models), you need to pick carefully. The i3 series works on dark floors fine — the older models sometimes refuse to enter a dark room.

Pros and Cons of the Roomba Lineup (Based on Real Life)

I’ll break this down by the models I’ve actually lived with, because spec sheets don’t tell you that the i7 will happily crawl over a phone charger and wrap itself in the cord.

  • Pros: The rubber brushes genuinely do not tangle with long hair (human or pet). The cleaning performance on hard floors is excellent — Roombas pick up sand, crumbs, and fine dust better than most conventional vacuums. The app is reliable, scheduling works, and the brand has the longest track record of any robot vacuum company. Replacement parts are everywhere.
  • Cons: Entry-level models are noisy and dumb — they’ll bump into your furniture for an hour and miss a whole section of the room. The camera-based navigation struggles in very low light (my j5 stopped working in the living room after we switched to blackout curtains). And the self-emptying bases are loud enough to wake a sleeping child — trust me, I learned this at 6am on a Saturday. Also, Roombas are not great with thick, high-pile carpet. They’ll clean it, but you’ll need to run them more often.

The Verdict: What You Actually Need (and Should Buy)

If you’re buying your first robot vacuum and you’re on a budget — say under $300 — the Roomba i1 or i2 will do the job. It won’t be smart, it won’t be quiet, and you’ll have to empty the bin every day. But it’ll keep your kitchen floor presentable. If you have pets or a messy kid, step up to the i3+ (self-emptying). That model runs about $400 on sale and has row-by-row navigation. It’s the best value in the lineup.

If you have toys, shoes, or random objects on your floor — i.e., you live with children — the j7+ is the one. The object avoidance is a game-changer. It won’t swallow a stray Lego, and it’ll pause before ramming into a shoe. I’ve had the j7+ for eighteen months and it’s never eaten a sock, a cord, or a doll’s arm. The older i7 and s9 models do not have this feature, and I cannot recommend them unless you’re willing to pick up your floor every single time.

And if you have money burning a hole in your pocket and you want the absolute best cleaning with mopping capability, look at the Combo j9+. It vacuums and mops in the same pass, and the mop pad lifts when it hits carpet. But be honest with yourself — do you really need a $1,000 robot vacuum? Probably not. The i3+ will save you more time per dollar than any other model.

The bottom line: Skip the entry-level models unless your budget is truly tight. Get a self-emptying base. And for the love of all that is holy, buy the one with object avoidance if there is anything smaller than a football on your floor. Sparkles named our j7+ “Mr. Clean” because it actually avoids her markers. If I could go back, I’d save the money I wasted on the bump-and-turn model and buy the j7+ from day one. You don’t need every Roomba on the shelf — you just need the right one for the chaos in your house.