Happy owner of a Looj since Christmas, I made its first test yesterday, it has embarked on cleaning a gutter littered fleet and merdouille (mosses and other advanced waste composting for at least 10 years). Bon ben the gutter is nickel, but against all that lies beneath is no longer at all. Yes the robot works is indisputable is not particularly discreet, but it works pretty well. Warning do not stay near or even below when walking, you may not shower you with clean water. I took the Looj 330 with its accessory kit comprising: storage bag, an additional spout, 3 different kind of ejector, 3 mills and two scrapers, the bag is well designed and allow any store.