Frequently Asked Questions

How many Roombas do I actually need per floor?

You need exactly one good Roomba per floor, unless you have an open floor plan where one robot can handle it.

What are the three most important specs to focus on when choosing a Roomba?

Focus on navigation type (vSLAM, lidar, or random), self-emptying capability, and object avoidance. Other features like Wi-Fi speed or voice assistant support are nice extras but not deal breakers.

Which Roomba is best for homes with pets or small children?

The j7+ with PrecisionVision is ideal for pets and kids because it can avoid pet waste, cords, socks, and other small objects. It’s worth the upgrade.

Is the entry-level Roomba 600 series good for a busy family home?

No, the 600 series (like the 692 or 694) is fine only for a small apartment with no pets. It bumps around randomly, has a short battery, and a tiny bin that needs emptying every other day.

Stop. There Are NOT 47 Roombas You Need.

Every time a friend or neighbor finds out I run a vacuum review site, I get the same question: “Which of the 47 Roomba models should I buy?” And every time I want to sigh a little. Look, I get it—iRobot has released enough variations to fill a warehouse. But here’s the truth from a dad who owns a handful of them (Sparkles named ours “Mr. Whirly” and “Bitey McSweep”): you need exactly one good Roomba per floor. Not 47. Not even three. One per level, unless you have an open floor plan and a single robot can handle it. Let me break down what matters, what doesn’t, and how to pick the one that’s right for your family without losing your mind.

Key Specs That Actually Matter (and the Ones You Can Ignore)

First, ignore the model number arms race. i3, i7, j7, s9—they all spin a brush and suck up cheerios. What separates them is navigation, dustbin capacity, and object avoidance. For a house with kids and pets, you want a robot that can avoid a rogue sock and a battery that lasts long enough to clean your whole main floor. The self-emptying base is a game changer if you have shedding animals or a child who loves dropping graham crackers. Mapping? Yes, it matters—random bump navigation wastes time and battery. The rest—wi-fi speed, voice assistant support, “keep out” zones—are nice extras, but not deal breakers. Don’t get lured by 47 spec sheets. Focus on three things: navigation type (vSLAM vs. lidar vs. random), self-emptying capability, and object avoidance. That’s it.

Who This Guide Is For

This is for first-time robot vacuum buyers who are standing in a store aisle, phone in hand, overwhelmed by a wall of boxes. It’s for parents who have resigned themselves to vacuuming every day just to keep the floor semi-clean. It’s for pet owners who find fur tumbleweeds under the couch. And it’s for anyone who has heard “but the new one has a 3D camera and can detect a charging cable” and thought, “Do I need that?” Short answer: probably not. You need a robot vacuum that works reliably, empties itself (or you don’t mind emptying it), and doesn’t get stuck on the rug tassels every five minutes.

The Real Difference Between Roomba Models

Here’s the condensed version after years of testing and living with these things. The entry-level 600 series (now essentially the Roomba 692 or 694) is fine for a small apartment with no pets. It bumps around randomly, runs out of battery fast, and you have to empty the tiny bin every other day. Not great for a busy house. The i3+ adds a self-emptying dock and decent navigation—good value for the money. The i7+ brings mapping and room-specific cleaning, which is handy if you want to tell it to clean the kitchen after dinner. The j7+ has “PrecisionVision” and can avoid pet waste, cords, and socks. That’s the one Sparkles named “Bitey McSweep” because it once ate a crayon and made a terrible noise. My honest take: if you have pets or a kid who drops small objects, get the j7+. It’s worth the extra hundred bucks to avoid a robot smearing dog poop across your rug. If you’re on a budget, the i3+ is fine. The s9+ is overkill unless you have wall-to-wall carpet and want the best suction—but it’s also shaped weird and doesn’t map as well as the j7. Pick the one that fits your floor plan and your mess level, not the one with the highest number.

Pros and Cons

  • Pros of owning a Roomba: Daily maintenance cleaning means you run the big vacuum less often. The self-emptying models (i3+/i7+/j7+) truly reduce hands-on time to once a month. Mapping lets you schedule specific rooms. Object avoidance on the j7 saves you from disasters. They’re quiet enough to run while kids are watching TV (Sparkles named ours “Mr. Whirly” because it sounds like a gentle hum). And they actually pick up dust bunnies that a manual vacuum misses.
  • Cons of owning a Roomba: No robot vacuum replaces a canister or upright for deep cleaning corners, stairs, or large debris. Self-emptying models are expensive (the j7+ runs $600 on sale). Non-self-emptying bins require emptying after every other run, which is a pain if you have shedding pets. They get stuck on low furniture, tassel rugs, and stray cords. The app is decent but sometimes forgets the map. And honestly, the cheaper models (600 series) are so frustrating with random navigation that they end up in a closet. Buy the right one or don’t buy one at all.

Verdict

You don’t need 47 Roombas. You don’t even need two if you live in a one-story house. What you need is one well-chosen robot vacuum per floor, and for most families that means either the Roomba j7+ or the i3+ if you’re pinching pennies. The j7+ is the safest bet because its object avoidance means fewer midnight cleaning-rescue missions. Self-emptying is non-negotiable for me—I don’t want to touch a dustbin every day. Sparkles once asked me, “Daddy, if we got a Roomba for every room, would they all be friends?” I told her they don’t need friends; they need maps. She said, “But Mr. Whirly gets lonely when he’s charging.” Kid logic aside, one good robot vacuum that actually works is all you need. Stop the model chase. Pick the one that fits your home and your budget, and let it do the work. That’s the only Roomba you’ll ever need.