The most expensive one is not the best one
A family upgraded to a flagship and could not see the difference. Here is why that was predictable.
A family upgrades from a £250 robot vacuum to a £1,400 flagship. Same house, same floors, same routine. Six weeks later they are quietly disappointed and cannot explain why. The floors are not noticeably cleaner.
This happens constantly, and the reason is structural rather than bad luck.
What the money actually bought
Flagship pricing is driven by automation and convenience, not cleaning ability. Hot water mop washing, mop drying, retractable LiDAR, extreme threshold climbing, larger dust bags. If your floors are mostly hard, you did not have a cleaning problem to solve — so the upgrade produced no visible change on the one metric you were watching.
The tiers, and what each actually adds
| Tier | What genuinely changes | Who notices |
|---|---|---|
| Entry | LiDAR mapping, adequate suction, manual bin emptying | Everyone — this is the floor of usability |
| Mid | Self-emptying dock, anti-tangle brush | Anyone with pets or long hair; anyone who forgets to empty bins |
| Upper mid | AI obstacle avoidance, mop washing, higher carpet power | Homes with cables, children, pets, or real carpet |
| Flagship | Hot water washing, mop drying, retractable turret, 4cm+ climbing | Homes with very low furniture, split levels, or heavy mopping needs |
The jump that is almost always worth it
Entry to mid. Specifically the self-emptying dock and the anti-tangle brush. These two change how often you touch the machine, and how often you touch it determines whether you keep using it. A robot vacuum you have to attend to twice a week becomes a robot vacuum that lives in a cupboard.
The jump that depends entirely on your house
Mid to flagship. Ask three questions:
- Is your lowest furniture under 10cm? Then a retractable-LiDAR flagship reaches places a mid-range model physically cannot.
- Do you mop daily? Then hot water washing and mop drying solve a genuine smell problem.
- Do you have thick carpet and a heavy-shedding pet? Then the top suction band earns its keep.
If all three answers are no, the flagship is buying you refinements you will notice for about a week.
Find your suction band
Floors, pets and household size — see the minimum useful figure and where to spend instead.
Open the suction calculator →Where the money would have gone further
The family above would have been better served by a mid-range unit plus a second mid-range unit for the upstairs floor. Two machines that each cover one storey beat one machine carried up and down, every time, because the friction of carrying it is what stops people running it.
That is the pattern worth internalising: when you have budget above the mid tier, the next best purchase is usually a second machine or better consumables, not a more advanced single unit.
Mid-range models cover most of what a robot vacuum can actually do. Worth seeing what that tier looks like before paying for the tier above. See mid-range models → Advertising — we may earn a commission.
Common questions
Is a more expensive robot vacuum always better?
No. Above the mid tier, price is driven mainly by automation and convenience features rather than cleaning ability. If your floors are mostly hard and you have no pets, a flagship often produces no visible improvement over a mid-range model.
What is the most worthwhile upgrade?
Entry to mid tier, specifically the self-emptying dock and anti-tangle brush. These reduce how often you have to attend to the machine, which is what determines whether you keep using it.
Should I buy one expensive robot or two cheaper ones?
For a two-storey home, two mid-range units usually beat one flagship carried between floors. The effort of moving it is what stops most people running it regularly.