Another happy Snugtop owner here. Good pricing and good quality. Have the cab high version, smoked glass all 'round and folding forward window. About $1600 installed.
Some brands seem very overpriced. Don't get one unless it's got the overlapping lip where it sits on the bed. A fold-down forward window is a good thing to get so you can clean the glass. I think someone above mentioned weight. If you are concerned with the affect on payload capacity, they weigh in at something like 200 lbs for an 8' bed.
With our smoked glass, it's very difficult to see through two layers of it when looking in the rear view mirror. One of these days, I'm going to get clear glass installed in the forward window.
I'm used to hearing these things called a canopy.