Got this one for my iPad and using it with amplitube. Works like a charm and the monitor output is of huge benefit. It can work with rehearsals, and when being on the road with a little amp.
Of course you can use it on the stage or in studio, but I prefer my pedal board and rig. On stage I'm kinda old school.
It's perfect for having around for students to work with good sounds.
The only reason I gave it 4 stars out of 5 is that I'd like to see the future version with 2 isolated inputs, so you can plug 2 guitars. I guess amplitube, or what ever is out there to be used, also needs an upgrade.
Anyways, this is it for guitar players, goin for the cool sounds of digital rigs coming out of a monitor.