They have a comfortable feel, I liked the step in, however they started falling apart a little on me after about 3 weeks. The cable started to fray a little, all the finish on everything came off, the loops to hold the cable broke. I would have kept them if they werent too small. I switched up for some Nidecker Vipers and I was much happier. Lot better hold, more lateral flex a lot lighter.
In summation if you want a good binding for just riding down the hill that you can get in and out of quick then get the K2's. 06/07 were much sturdier than the 07/08, a little heavier, but Im happier with those than I am with the ones Ive returned