Not being an iphone owner but having played with the itouch I would be grateful for your opinions on the new app and how useful is it.

Is it something you won't really touch if your main desktop comp is nearby, but handy to have if you are out of the house and you want to pass some time playing around with biab arrangements? (the impression perhaps the wrong one that I have)

1 can you play and regenerate realtracks on it?
2 if so can you save the regenerated realtrack to itouch only and it won't affect your main desktop biab computer arrangement?
3 as The itouch I may get will only have 8gb of space does this create a problem?
4 can you use the app as a remote control for the main biab on desktop?

All in all is it a big big plus and worth having?

sorry for asking all of this but apple stuff is not something I am very familiar with.

axey