This is very fun. It's primarily used by my small child but it also fun just to play around with. Because it's pentatonic, most anything sounds good. I'll actually play guitar chords in Am or C major and it sounds pretty good when my child plays.
The only thing that could possibly be improved is ease of tuning. I believe having such small strings makes it difficult to get precisely tuned. Precise tuning, however, is not necessarily important because I believe it's more meant for children and isn't intended for playing along with other instruments. But I like having it precisely tuned in order to have a simple "jam session" with my child. It is still possible to get precisely tuned, it just takes longer than other instruments we have. Anyway, this is very nice and we're content with the purchase.