Lefant M310 buying guide: is 28 cm right for small homes?

The short answer: the Lefant M310 is worth a look if fitting into a tight Japanese floor plan and sliding under furniture matters more to you than proven cleaning power. The listing describes a 28 cm diameter, 7.8 cm tall body, a 550 ml dustbin and app control [S1]. Everything about suction, obstacle avoidance and mapping comes from the seller's own copy, and no independent measurement is supplied. Who it fits - Households with narrow rooms and low-clearance furniture, where a smaller body matters more than a large battery. - Buyers who would rather empty a 550 ml bin less often than a small one [S1]. - People who want both a physical start button and the Lefant app for scheduling, suction adjustment and mode selection [S1]. Who should skip it - Homes with wall-to-wall carpet or large rugs: the listed recommended surface is hard flooring [S1]. - Anyone expecting mopping or a self-emptying base. No mopping function is stated, and the box contents list only the robot, charging station, AC adapter, side brushes and manual [S1]. - Buyers who want third-party test data before deciding; none is provided here. Limitations to check before ordering - 4500 Pa suction, BoostIQ, obstacle avoidance, drop protection and dual filtration are manufacturer claims in the listing, not independently verified figures [S1]. - Runtime, charging time and recommended cleaning area are not stated, so they are unverified [S1]. - “High-precision mapping” is mentioned, but the sensor type and map accuracy are not described; the only concrete app function listed is displaying the cleaning route [S1]. - Japanese-language app support, a Japanese warranty or repair contact, and availability of replacement side brushes and filters are not established by the source [S1]. - The feature list includes “auto dust collection,” yet no auto-empty station appears in the package contents. Clarify what that term refers to before buying [S1]. Price shown at the time of writing is ¥14,197 against a list price of ¥18,058; prices on this listing can change, so confirm at checkout.