Review on Topeak Wedge Pack Fixer Medium by Carl Movahed

I bought this from LBS and it's great because I can take it back. I wanted it for my wife's bike, but the Bontragger seat that came with the bike no longer has vertical rails to fit in this bag. You are just straight. The pocket clip has an angle of about 30 degrees or more, so it doesn't fit at all. So I tried this on my mountain bike, the rails on this saddle are too narrow. I tried it on my Brooks saddle, they are too far apart, I tried it on a Scott saddle and again it doesn't fit. So which saddle is right for you? I suggest taking my saddle to a shop to see what will fit before buying. I'm going back to the strap and hook, a simple system, don't worry if it will fit. Otherwise I like the style of the bag. It looks like a very useful system. Too bad that won't work.