I own and am happy with many AlertShirt shirts.

I own and was disappointed with one AlertShirt jacket--the pullover windbreaker. The reason I don't like it is the cut. It's cut for fat guys sitting on backhoes all day. While it fits well in the shoulders and arms, I could make a whole second jacket with what flaps in the wind around my middle. For reference, I'm 5'-10" 175 pounds and bought the large.

Since then, I've found the AlertShirt folks are very good about returns. And they're very good on the phone. You just have to remember that their primary market does not have a cyclist's physique.