I've got the new greenstuff pads.
At first i wasnt impressed - they faded easily. However, they've bedded in better now, and although a bit squeeky at times, they stop the car well.
I'm in two minds still though whether to go for DS2500's next time round, although to be fair, lately the greens have not let me down, despite their early poor performance.
As said though, they arent too grand cold (although no worse than OEM IMO) but once a bit of heat is in them they seem fine, although arguably still some room for improvement.