The drum beats are okay, nothing special. But no self respecting artist would use a drum loop that comes with the program anyways.
Suggestions for updates
-import your own audiofiles (ie better drum loops)
-change track volume along timeline (so that fluctuations in volume can be adjusted post-recording)
-trim tracks (i always have a few seconds of drum beat alone at the end of the song)
-loop option for recordings
-change tempo of preset drums (each loop is stuck on whatever bpm it is set at)
I havent seen most of these features on any recording studio app, and although this one is already my favorite, these additions would put it head and shoulders above the rest
DestinyManChild about StudioMini - Music Recorder, v2.0.1