Tito,
1. The transmission was notchy in my '05, and was at its worst when cold. NOW the '08 transmission is not notchy, hot or cold, so far. That being said, I have another 75 miles to put on it to have it fully broken-in, so I have never put the pedal to the metal. If it's notchy then, I'll repost.
2. The suspension and tires made a world of difference. The old runcraps were the worst tires I've ever had on any of my 4 Vipers. These tires/suspension go straighter than anyof them. In the soft loam soil of Louisiana heavy 18 wheelers pulling gravel or large pine trees cause the asphalt roads to develop deep ruts. When the runcraps were on my '05, the tires wandered all over the road following the deepest ruts. These PS2's don't do that nearly as much. I'd say 90% better than the runcraps. Bottom line: no tires this wide is going to handle ALL the ruts in the roads, but the steering is so precise that I never feel like the car is wandering out on its own. Yessirree. This car drives a LOT better than the Gen. III's with runcraps. I never had a chance to drive a Gen. 3 with PS2's, but if I had a Gen. 3 I'd burn those runcraps (JON B. told me so, but did I listen-no, I opted for two runcraps in the rear, and ended up losing the car in an emergency maneuver) and get some PS2's Immediately, if not sooner!