I love GDE. Just installed it 2 nights ago an just absolutely 100% love it.
I use a 4 screen cube (didn't want to get 5-6-7 screens, would just annoy me I think), the hero black theme, and an application dock on my home screen with a large clock.
Really a big improvement of feel over the standard screens. It may take you a day to get used to it, but its great. I used to have a "phone" button and a "web" buitton on the bottom left and bottom right hand spots of all 3 of my screens, this just puts them on every screen for you and frees up room.
Even if it only gave you the application dock it'd be worth it.