I've purchased at least 10 of these shirts over the years. I walk to work every day (a round trip of 3 miles), and wear these in the cooler months. I live in western Oregon, and find that these keep me warm enough on all but the coolest days (but I do tend to "run hot"). I'm short - 5'2" - and pear-shaped, and find these hit me in the perfect spot (below my waist, but not all the way to my hips/thighs, which would bunch and be uncomfortable.

So, overall these shirts are comfortable, thick enough to wear in fall and winter, and thin enough to wear into spring. The colors are nice, and I don't find many of them to be see-through (except the yellow for some reason). My only gripe, and the reason for three stars instead of four or five, is the armpit seam. EVERY single one of these shirts opens up at the armpit after one wash. EVERY. SINGLE. ONE. Now, for $6-8, I don't mind doing a little bit of sewing, but it's still annoying, and it seems like such a weird quality control issue. Just something to keep in mind when you purchase.