Some problems that I had after flash from R1 to R2.
When in camcorder mode the brightness too dark compare to camera mode. The market sometime have problem with network and crash.
GPS it took to 2-3 minutes inside the house to find the signal. R1 is definite faster about 15 seconds. R2 is little bit lagger with Igo navigation maybe I have to Odin back.
i want another option in my rom flashing collection . and knowing eugenes skills this one will be as good as 2.3 (he built best kernel for a vibrant up to date he outdone SMSUCK imagine whaqt he can do with a simple ROM)