First off, the 400 plastic is amazing. It's grippy, flexible in the heat, rigid in the cold, durable, remains stable...it's the perfect plastic I believe. The A3 mold, the whistler mold, is a great disc for some I'm sure. However, I have tried 300, 350G, 400, and 500 plastic versions of this disc and just can't get it right. I am an avid A2 thrower and use a beat-in 300 A2 for that more glidey spot in my approach arsenal. As for the A3, it flies straight with some glide, then fades out hard at the end with little to no skip. On forehand, the A3 can handle a ton of power and snap without rolling over. The A3 does, however, require the user to have good form on backhand and forehand. I have found this mold to be more strict on the thrower having little to no OAT and good arm speed to access all the characteristics of this disc. When you do it right, you get great results. When you don't do it right, an A2 is more forgiving....IMO!