Having driven the car for a few days now, here's a little update.
The good: I'm still lovin' the NST pulley. Couldn't be happier. Mid-range really is much more punchy. Feels like more than 5 hp but who knows. All I know is that it revs much faster and seems to pull harder. I can't wait for the other pulleys!!
Other than the increased performance, the car idles a little rough, especially when warming up. Even after it's warm I can definitely feel the engine vibrating more than before. This is only at idle.
I have the five speed and I've noticed that takeoff requires a little more clutch than it used to. However, once rolling, accelleration is smoother than before. The last thing is that the car doesn't want to creep as easily at low speeds which sucks in traffic. Buuutt.... accellerating away from the toll booth is a blast!!!

Anyway, my 2 cents.