Phew, says my bank account. I saw this last night, and told myself I'd take it if it was still available in the morning.
As far as specs, if my memory serves, it's about the same capacity as a GG Gorilla, 2850 cubic inches all told.
That's why I almost took it. I never use the frame on my gorilla anymore, I could save 1lb with this.
I have a GG Whisper I picked up for next to nothing here, but I've found I really prefer at least a minimal belt for stability and side pockets. Haven't figured out how to pack it yet so it's stable.