These are some good quality biking pants.  I ordered a M and it fit perfectly.  I usually wear a size 32-34x30-32 depending on the brand (5'11" tall).  I noticed some people saying that the pants were too long, but I did not feel the length was a problem.  I was wearing them higher over my pants to protect my rear from the back splash of my tire; so I guess if you want to wear them low, they'll be too long.  There's a velcro strap on the ankles which is very handy.  However, I don't feel like it allow the pants to get tight enough to leave your normal biking ankle strap at home.  The pants are really bulky, but in my experience, I did not feel like this was too much of a problem as I was wearing them over jeans to begin with.  Plus, it helps to slip them on easy.  I could have slipped them on over shoes, but I chose to remove shoes first to avoid getting the inside filthy.  There are slits to allow access to your pants' pockets underneath, which is a really nice feature.  There's no velcro or zipper shut, but I didn't find any water sneaking in while riding so I guess it remains shielded enough from the conditions.  Definitely a great value at amazon's price so I'm very pleased.  I don't know about durability yet, but the material feels similar to a north face windbreaker jacket so I'm not too worried.  My legs didn't get overheated inside them, but it was in the 40's.  Have to see how they cook in the summer.