Before these vacuum cleaners, there was an IROBOT, an excellent vacuum cleaner, but the battery became unusable from time to time - they bought a Chinese battery - and the poor fellow, went crazy , . looked at a new one, but the prices really hurt , bite , and then XIAOMI ads popped up , and even inexpensive, they bought . after a couple of weeks the levers on the brush holder fell off, after a month a crack appeared in the water tank, if the vacuum cleaner did not use all the water, then it was going to puddle under it near the charging station, after two months it , they turned off the fall sensors and he fell down the stairs . The second one was bought for another floor - it works in a gentle mode - once a week it cleans a couple of bedrooms and a hall - this one broke a month later the water supply valve on the tank for water, bought a new container - it turned out that there were no original ones to replace, the non-original one sits in place with difficulty . washed, cleaned . it took three months for him to also yuchili sensors and he suffered the fate of the first colleague . In short, it did not work out to save money, it's better to take IROBOT right away !