I have the Sol Cool 1/4 zip LS shirt in Olive from ~3yrs ago. I would not buy it again unless they've changed fabric. Rough texture, very warm and most annoyingly quick to REALLY stink. Must clash with my garlic infused blood chemistry!
On the other hand, my Patagonia LW Sun Hoody is a much better. The fabric has some serious cooling mojo going on and I can go a few days longer before it develops only a mild funk. It would get a solid 10 score from me if it had a 1/4 zip. As it is, I give it an 8!
To that end, I bought the highy rated Rab Boreas but have yet to have it forwarded to me from my USA address.