Summary: A great game if you are looking for a all-around driving game. Tons of different cars with different handling characteristics that can be tweaked. If you want NASCAR racing, you got it. Rally racing? Got that too. Lots of different tracks. The campaign game is challedging, but not overly frustrating. This game challedges you on having a variety of racing skills that you need to have.
Summary: most racing simulator reviews sound eerily similar; "supercharged gameplay" or "feel the crunching of metal!" and before I purchased this, thats exactly what I read as well. Race Driver 2006 for the PSP is, hands down, the BEST racing sim on the handheld today. That may be due to the fact its the ONLY sim racer on the system. Ridge Racer and Burnout give you plenty of arcade fun drifting, but RD06 goes that step further.
Summary: Referring to TOCA. This game plays well and looks very good on the PSP. I like the different modes of play and the many cars and tracks you unlock as you win races and overtakes. A note on price: I picked this game up last week at gamestop new for $19.95.