Everything worked perfectly out of the box: I overcame thresholds of 1.5 cm, drove on carpets with thick pile, built 3D maps . after about six months, demonism began: the water container began to become covered with a web of cracks, after which it generally flowed from all sides (no spare parts nowhere, even Ali), began to discard cards, and place new ones in the application 180 degrees, from the original card, then to the left, then to the right, began to break off from charging and go in an arSee full review