They are cheap, comfortable and are long enough, coming below the waist. The quality feels fine; pretty thin, but aren't exactly see-through. Will shrink slightly in the wash. Not sure if they'll shrink enough to justify going a larger size. I'm 188cm (74")  tall and about 94cm (37") around the chest, and medium fits fine after the first wash.

Odds are if you're looking for a pack of soft, crew-neck tee-shirts, you've found it. I'm not sure there's all that much more to say. Buy them, stop wasting your time reading reviews about tee-shirts and get on with your lives.