I have a pair of the original griffons mounted on my Elizabeths. I ski at a DIN of 8, and these were the perfect match for the skis and my specs.
Durability: This is the big one. Many many people have complained that there is too much plastic on these bindings and that they will just break. Mine have held up better than any other binding I have had. Note that these are not on my every day ski, but they have been pushed fairly hard. I have no doubt that these will last the life of the ski. I have seen a pair with a broken heel support, so if you hit your bindings together alot, or are very aggressive I would suggest the Jester. I also had a pair of Jesters on my park skis, but they turned to shit. Both heel pieces had play on the track and at the pivot point. I have not had either of these issues with my griffons.
Park vs. Pow: These bindings are good for both. The positives include the wide platform (80mm is hardly wide, someone needs to come out with a binding that is 90mm), light weight (some people care about binding weight), reliable release, and the short toe toe piece. The negatives are mostly in the pow category. Dildo style heels are better suited for park skiing in my opinion. They are a pain in the ass to put on in powder.
The newer models have an adjustable AFD for worn boots which is a plus. The only "bad" thing about these is the long heel track, which hinders the flex of the ski. This is not a big deal on stiffer skis, but it may make your tails a hair less playful, probably not too noticeable. The heel pieces are very easy to adjust as well. They have a worm screw instead of the stupid tab that rossi / look uses. As always, if you do not know what you are doing bring your skis to a shop to get them adjusted properly.
Overall, the griffon is a great mid level binding. A great step up from the PX 12. I personally prefer the STH and Mojo style heel, but everyone had their own preference.