During the first week, it would have been a 5 star review. The operation was easy and the performance was great. Charging the battery was a simple task. Later, there was a problem with the brush head and it was a burnt smell whenever I tried to use it. I also had to clean the brush after every other use. It was a huge investment (I bought 3 units during Kickstart) so I was very concerned. Upon reaching out to Lupe, they identified that there was a problem with the end of the brush. Apparently hair can enter that small round part and damage it eventually. They immediately sent me two replacement brush heads and also said they would work on a new brush head that is more robust with hair. Being a customer if their competing brand for years, this incidence concerns me deeply. I do not know when they would actually make and send me the new brush heads. Currently the vacuum just sits at the corner. It is way too much hassle to take the brush head apart and clean after each use. To me, handheld vacuum should be the most convenient vacuum to use in the house. I have a small handheld vacuum (cost is 1/6 of Lupe) that I have been using for over 5 years with no single issue. For the costs of the Lupe, I definitely was expecting the best handheld vacuum. It seems that it is more powerful than the leading brands, but it does not last more than a month. Customer service was prompt so they did earn one star in my review.