GT4 is going to be a blast!

Played it.
Loved every minute of it.

I heard a number of people Bi*ch and moan about the physics engine. I love it. Once you lose traction, the car loses its ability to turn well. I don't think that the 1000hp skylines of GT3 are going to be the fastest way to go in this game. By the way, I started the game with g-limited mr2 with 39,000 miles on it.
Well, off to class.

Mr-2 sucks hardcore in the MR races. I chose not to load GT3 info, so my budget is very small. All I have is racing chip.

Love it as well.
The new physics engine takes a little time getting used to, but I have no problem with it at all.
The MR races are tough with the MR-2. Even though I'm playing with credits imported from my GT3 save, I'm semi-pretending that I'm on a low budget as well, just to make it challenging for me. With that said, I bought a used MR-2 GTS for the MR races. It's tough because you're in the beginning section with a small budget and they expect you to race against NSX Type-Rs and similar cars. I got through it, but it wasn't easy.