I'll add to my comment to say that I still buy them as I come across them, but still prefer the standard Topps and Bowman releases. Yes, I forgot to mention that the curling issue sucks, and it seems to happen with cards made from this material sooner than with others from my own experience.
Upper Deck has an annual set each year that they release through Tim Hortons. That curling issue occurs quicly with those as well, with a good portion of cards I recieved on Christmas morning being curled fresh out of the pack.