Greatest all around pants made. Hiking, backpacking, mtn biking, anything. Thighs are kind of tight, however. I have the paramount shorts and wear a Large. Had to reorder a pair of XL pants to allow extra room in the thigh area. Also, the LONG could be longer (~1-2"). I think the long is 33", would be nice to see a 34" or even 36" for the long, but only a small gripe.
I don't think I will zip the legs off, but it may come in handy while biking. For colder weather, I wear a pair of insulated long underwear underneath. These pants alone aren't very warm, however they do a decent job. The pockets are very useful.