I've been using the Mountain Fury tights for about 3 months now, in mountains and in running around Hampshire hills and fields, and I like them! The material is thin and smooth, and while they don't immediately feel as warm as a pair of tracksters, say, the windproof fabric feels comfortable in the dry and sheds water quickly in the wet. They are a tight fit, but not excessively so. I find them an especially good fit around the ankles, with the zip closures keeping them nice and trim.
I'm not sure I agree with Miko about sizing. I have a 32" waist and short legs, and a Small is a perfect size for me, as one might expect. Maybe Miko has chunkier thighs than me!