I have the insert setup from Performance and think they are very nice for the money. I just ordered the glasses and lenses from Performance and then WalMart filled the Rx. They work fine for me and were around $200 complete.

My husband had Smith glasses with an insert before getting the Tifosi glasses. He likes the single lens Tifosi much better. Even with his poor eyesight the Tifosi lens is excellent, better then the Smith insert. Plus the single lens is way better if you sweat a lot. Occasionally sweat can get between the lenses - big PITA.

He still uses the Smith's with an amber lens for low light conditions, but I wouldn't be surprized if he spings for another pair at some point. The biggest advantage of the inserts is you can swap lenses for light condition.