Hands down my favorite board game.  It's great with 2 people (you can each race with a couple of cars like a team) it's great with 4, 6, 8, 10 people!  The game is super deep too.  Meaning, there's a really easy to pick up and play beginner mode, then there are still 2-3 more modes you can play with increasing difficulty and complexity.  Absolutely a fantastic game.  A must have.