I've driven the automatic Sky RL version, and the manual Solstice GXP. In the automatic, it seems like the shift points really damper the full power capacity of the engine. Overall it really wasn't that impressive and didn't feel like there was a whole lot of extra power in the Sky RL. The Solstice GXP in manual form however felt A LOT faster since you could choose which gear you want to be in and when you wanted to shift. And in the engine info display (think CobaltSS info center) the boost gauge only hit 18psi, not 20psi oh well
hehe.
I don't know if the automatics will feel that sluggish when they are in full production, since I drove a real rough slapped together model Sky RL. The GXP I think was production intent so full engine tune felt right.
Oh yea, the placement of the door locks on the inside of the doors way behind your shoulder, and the side seat adjustments are kind of annoying. That will not stop me from owning one of these in the near future as a secondary cruiser vehicle.