I have the Vivo S3 and really enjoy playing it, at first I was having problems with the midrange sounding distorted when I played it, someone else was reporting the same problem with his S7 and he got rid of his but I thought I,d wait it out and hope they'd come out with an update which would solve the problem . The 4.01 update helped it out a lot. The distortion seemed to only come from the speakers , it sounds good on the headphones . The piano sound on the Vivo Grand is full and smooth and would be great playing solo or with a singer , in a band context I'm not sure how it would hold up to the guitar players , in a Jazz group it would sound great . I wish they would have a reprisenative from Dexibell come on the forums to discuss any issues buyers are having with there pianos. You can email them and they do answer their emails I would just like to know how other players are getting along and if or what problems they incur . I'm having fun playing mine .