I just got a set-up of these.
They are slightly thinner (2 cards) than Modiano but not as stiff. Both sides are textured, the faces slightly and the backs more so.
They have a gloss on them that makes them slicker than any other cards I have. I'll put them in play the next game and let you know the general reactions. If you like slippery cards these are for you. The novice shuffler will have a hard time with these. We're going to be playing 52 card pick up some I think

As far as Paper or Plastic, they are definatly NOT Paper. They bend and keep their shape like any plastic card.