I got the Stratos a couple months ago. I am 5'8", 150 lbs, and it seems to be the correct size for me (padding thickness, saddle width, etc.) The cutout is substantial. I have never had numbness with it (longest ride on it is a little over 70 miles, first ride was 65 miles). I did get minor saddle sores at first, but that stopped once I got the position set.