Quite good, but not nearly as it could have been with a few slight changes.
The new cars are without a doubt great, we get a couple of Porches, Mercedes', Lamborghini's and some other nice cars. Still the biggest miss would be that there are no exotics, and basicly no muscle cars, the only old muscle car is the Camaro which can only be used in 1 specific option, and as a muscle car lover, this is definetly a downside for me. Also the only ricer i liked is gone in this game, the Mitsubishi Eclipse, and yes i know there is still a Eclipse in the game, but that car is so much different to the beloved Eclipse that was used in Underground 1 and 2 that it shouldn't even be called a Eclipse.
Graphics wise the game is amazing, and with a well designed world it's definetly a treat to race in, ofcourse the PC requirements shows that, if you got a pretty new PC then it shouldn't be a real problem (unless you bought a low end or outdated PC), but if your PC is 2 years or older then you can probably forget about running this game in a proper way.
The Gameplay is where the problems are, i don't remember how far back this goes, but like with NFS UG and UG2, catch-up is back, this must be the most horrible option ever, with this option you can race a perfect race, make 1 mistake at the end and lose all your work, some races are very hard to beat because 1 of the last few corners would be a really hard 1, which the computers seem to do perfectly, and makes you lose the race.
Still atleast in previous NFS' you could choose the diffeculty, but that aswell they have removed, now i like to think of myself as a expierenced gamer, i been playing games since i was 6, and i always beat my friends and family in games, still here it has gotten very frustrating for me.
What's also very frustrating are the chases, at the beginning they are lots of fun, and well when you get more after you it's fun aswell, untill you need to shake them, when you get to x5 it's very hard to shake them, and due to milestones you have to reach during a chase (such as cost to state which you build up by destroying things and police cars) you can easily lose about 20 minutes of gameplay, and when you get caught you lose everything, and you need those points to build up rep to compete in further races.
Still untill you need to shake them they are really fun, you get to ram through roadblocks, ram police cars untill they are destroyed, and with a lot of points where you can destroy something and thus destroy the police cars behind you it's definetly fun.
Another dissapointment in the game is the lack of customization, now i know this isn't a Underground, still they did go around putting a lot of things in the game, but unfortunaly you can't essemble your own body kit.
Still all in all it's a good game, it will be good for many hours, you got nice graphics, and most of the time the racing is excellent, it just can get quite frustrating from time to time, the only cure against that is to take a break and continue later.