I've heard the Tenzo R's were really bad with crash testing. They tend to actually snap if you get in a bad enough reck... just rumors but I've seen one in 2 pieces and decided after that that I would never buy them.
as far as real "race" quality is concerned, they are crap. Pick up the newest issue of Sport Compact Car, they have a whole section about aftermarket racing seats for 2003-2004. FYI, reclining seats cannot have FIA approval..although it doesn't sound like you were thinking of getting them for FIA racing..