Now that I've been using the program for quite a while now, I must say that I really like it and haven't gone back to GP5 at all. Definitely worth the upgrade in my opinion.

I'm very impressed with it the user interface is much improved and the sound bank is sweet as. Definitly better than GP5 and well worth the money.

There's a great review for the 314-CE on theguitarpage.co.uk
The extra money is definitely an issue to consider though.