... but the glasses themselves were not so great.
Here are the problems:
1. The "wrap-around" style defeats the purpose of the glasses. Ideally, the lenses should be on a flat plane, parallel to the video screen. With these you are looking through the colored lenses at about a 35 degree angle. This introduces optical distortions as well as color density anomalies. In addition, since most prescription eyeglasses are on a flat plane, it's hard to fit the Pro-X glasses over your prescription specs (try putting your prescription glasses over the Pro-X; it works better).
2. The frames of these glasses are made of a brittle plastic that breaks easily. This is a problem because the frames flex in the center every time you put them on or take them off. This repeated flexing will eventually cause the frames to snap in half. Also, the frame hinges are molded into the plastic, held together with a tiny screw (this is not really a problem, because the frames will break long before the hinges fail).
My first pair of Pro-X 3D glasses broke after wearing them for about an hour. 3D Glasses Direct replaced them instantly with profuse apologies. The replacement pair lasted two days until they also broke in half. This time I asked 3D Glasses Direct to replace them with the "Clip-on" style 3D glasses. They agreed, and for this I give them five stars and high praise.
The clip-on lenses are the "flip-up" type that baseball outfielders wear. The lenses are in a flat plane and they work well with my wire rims as well as with my thicker plastic frames. This is clearly the superior solution.
If you don't wear prescription glasses, get a pair of cheap sunglasses, remove the lenses and use the clip-on. You will be happier in the long run.