I have ordered and installed 8 glass block windows for my bungalow. Bizik is by far the least expensive and easiest to work with of all the vendors that I researched. I had watched two of the windows being installed, then did the rest myself. When I broke an internal block in the window (while installing, oops), Bizik was able to replace the block within 24 hours. The location is a bit out of the way but worth it. I am now replacing the windows in my sister's house, and will buy from Bizik: the price really hasn't changed much in 5 years!!
Pros: Cost, Service, Quality