Suprisingly Awesome
After reading the negative reviews below, I kinda expected this game to suck. However, I have to say without reserve that it is ~awesome~. It is slow to get started and requires a lot of patience and skill, but the unexpected payoff at the end is well worth it.
The upgrades seem insanely expensive at first, but once you get the third rocket booster and some decent tricks, it's easy to get $15,000+ in a single jump. Buying tricks early on and not wasting money on groupies until later is the way to go.
Definitely an improvement on the first game, and the two "secret tricks" were very unexpected and decently challenging to pull off.
Anyway, "Victory" on jump 99 with everything bought - but I lost a groupie. :)