Having been very pleased with the previous version of Under Armour ColdGear tights I must admit to being quite disappointed with these.
The first issue is that, unlike the earlier non EVO version they don't have a drawstring, which tends to leave them feeling a bit insecure around the waist as they don't have much tension around the waistband because the fabric isn't very stretchy.
Secondly, as an earlier poster pointed out these are a very tight fit over the ankles. Compared to the non EVO version in the same size which slip on and off with ease, these are actually difficult to get on and off to the point where I feel I'm in danger of ripping the stitching. For reference I'm 6ft tall with size 11(UK) feet and bought the XL ones which seem to be okay length wise, so if you're a similar height with smaller feet you may be okay.
One final, minor issue is that Under Armour still don't fit any form of key pouch or pocket to their tights which would be a very useful addition.
On the plus side, the fabric appears to be the same as that used in the EVO ColdGear tops that I use when training for ice skating in a very cold rink which seem warmer and more comfortable than the earlier version of the top.
So, if you can get a pair that fit you and don't mind the waistband issues they might still be worth a try, but personally I'll be going for the non EVO version in future.