Picked this up yesterday after playing Nations for a few days. Bargain at a fiver. Played a few online games, but not really good enough yet.
What I like about the single player is how "right" the difficulty is. Bronze and silver are generally avaiable after a bit of practice, but gold on some tracks is very testing. But the important thing is that it never feels completely out of reach. I am always ready for "one more try"
The first muscle car (Island?) track is a real challenge and is a stiff indication that you will need some practice/patience. I had to beat the trackmakers time just to get gold

Took me over half an hour LOL.
Not sure about the rally or coast yet. Perhaps they will grow on me. I also much prefer the racing tracks to the jump/stunt ones.
Overall, a great game, especially at 1920x1200
Looking forward to downloading some more tracks once TMExchange gets back online. I am presuming there will be re-creations of some famous circuits from aroung the world, Trackmania style.
How much more can you get for a fiver?

Nadeo deserve all the success they get IMO.