I am using SampleTank iOS almost exclusively in Live Mode.
Almost a perfect app with a few issues.
1) can you do a program change from a midi keyboard (send midi message)?
2) save the Live multi externally, like via email.
3) most "lead" samples have portamento. I wish you could control the level.
4) the ability to turn on/off polyphony would be nice.
That's it. Do the above and this thing gets an 11 out of 10.