I have 3. I bought my first one because i wanted it like mad crazy. then i bought the second one so i'd have one to interact with it to see what it does. then i bought one for my boyfriend at the time because he got jealous. then i just bought another yesterday because it came in a set with the movie and the figures. i didn't want the tama music star but that was the only way to get the figures and the movie XD
I have one and I doubt I'm going to get another. They are really fun but also require a lot of work for something that is, in my opinion, not that rewarding. I don't like the adult stage with the auditions and stuff all that much. Overall though it isn't bad, just not my Tama of choice