No Problems Here!
Not sure what the difference between my shirt and the below reviewer's, but mine has been through the wash a few times now (at a laundromat no less!) and its still the same size!
Anyway, this thing is super comfy. A little thinner than a lot of similar stuff on the market (I own a similar Smartwool) and this thing isn't nearly as warm BUT regulates temperature better once you get moving. As with anything else, compromises.
Other than that, awesome wool super powers (warm when wet, wicks like there is no tomorrow, and odor fighting) make this my favorite base layer.