I rode on the SLK for a few months...until I noticed that one of the "halves" started to droop lower than the other half. And like Muireen, I thought the channel (or rather the lack of separation between the two halves) was not sufficient. I thought I had gotten a defective saddle (which actually might be the case), but I never did try and return it because it involved quite a bit of red tape (had to go through a distributor, blah, blah, blah). I ended up settling on a Specialized Ruby 155 and I've been pretty happy with it. I still get some minor sit bone discomfort whenever I near the 70-mile mark, but I'm betting that would happen regardless of which saddle I had on my bike.