Had high hopes

I have been wanting a robotic vacuum cleaner since I found out they existed and were affordable. I had high hopes when i got this robotic vacuum cleaner. Unfortunately it missed the mark by a long shot. PLease note this only works on a vynal or hardwood surface, this vacuum is not ment for the carpet. I tried this out in our bathroom, figured it was a decent sice to try it out. It worked, but no matter where i placed it in the room it kept going in the same triangle over and over again. Unless i picked it up and placed it in another part of the room, it never moved from that same triangle. Even when i did move it, it somehow went to the same triangle again. Eventually i gave up and turned it off. It did pick up some first and whatnot from the floor, but without moving from the same spots it does me no good.