i think that's a question that will be best answered in 10 years or so - will they hold their value against the flametop R9s and R0s?
as far as playability, i love my G0. i got it to use as a stage guitar so i wouldn't have to gig with my R9 and it's every bit as good (or better) than many R8s, R9s, and R0s that i've played.
The G0's a great value and pretty much the exact same guitar as an R0. it makes you wonder if flamed maple is really worth $2500 more than a good slab of plain maple and, if not, how overpriced are these guitars to begin with?