Definitely do a free trial. I tried 2, Mini Maestros and I think Hey Di Ho. Really disliked the second and found the lady who ran the Mini Maestro's one just seemed to have a really good rapor with the kids. The other lady was like scary old school teacher!

DD1 loved it, but did want to dance more than sit there and bang sticks. Often she would hand her instruments back and do a bum dance in the middle of the circle