I had the 1st heat, dropped it after 2 races, the rubber band AI was too much for me to enjoy.
Got the 3rd game, enjoyed it quite a bit. People classify the game as "terrible" and i honestly don't understand why. I did Career mode and took my team from dirt to cup, so I enjoyed it quite a bit. It's not supposed to be a sim, i guess these days a game is a sim or is "terrible".
I don't know 704 from anything other from this series, so i'm guessing they will be developing not only the game but themselves as well. Each game has been an impovement over the previous (or at least the 3rd was a massive improvement over the 1st), so i'll see where it goes. I expect this game to improve in something. Either sound or career mode depth or customization, or features (I don't really care about graphics).
I am not able to really follow the season so the games are a good way for me to keep in touch with what drivers are in what teams, and stuff like that, and again, in Heat 3 I enjoyed the gameplay, and as it's a game we are talking about, that is enough for me.