i love my tama-go. It's definitely worth it considering how cheap you can get them.
The main issues people have with them are how big they are and how you have to buy figures to get new games but really i'm just glad they even offer the option.
the previous versions like v5 and the music star had 4 games or so. i don't find it so ridiculous to have to buy figures which are cheap now too to get extra games. I spent maybe like 20 dollars for my 5 figures and that gives me 10 extra games. so i don't really think it's that unreasonable. sure with the id and id l you can download new games but comparing the tama-go to english versions the figures are really a plus in my books.