I tried to convince tech guy of praise band at church to go to hardware module with key controllers he purchased but he went right to software based he could control wirelessly (along with digital mixer) with iPad . They have a stage piano with a few sounds-strings,piano also. Now when he's on vacation or otherwise away, what does the keyboardist do if they don't have his iPad? Right now they play without those backing tracks or sounds until he gets back..a hardware module would eliminate the difference..but he's young, and today's youth is about software based everything..