Amazon calculates a product's star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I use this machine only two times,same result as my friend, do not buy it, waste of money!
Good: 1.Cheap 2.Fast Shipping
Dislike： 1. It doesn’t suck up anything and it’s not that easy to clean. 2. Bad battery, i think take 4 hours to charge. My machine takes 3+ hours to charge the first light. N then another 3. hours to charge the other 3 lights. Now, it's even cannot be charged. 4. This product advertises self vertical stand technology due to low center of gravity. Doesn't work. 5. It’s doesn’t have good vacuum power, i think even cannot clean your car