I bought the DLC and played about 1-2 hours of it. The bikes do feel a little touchy, maybe i just forgot how they feel. But they seem extremely easy to bounce, pop a wheelie, or fall face first. They also feel like they are light as a feather. But again, i may not remember how they were in the main game as much. Really wish i could customize my own bike, and give it my own personal ratings.
Racing Evolved - Beginner/Easy - I got 66% complete, one gold and two silver.
Down and Dirty - Easy/Medium - I only got 33% complete, one silver and two bronze. This course only allows the bike you pedal, called the Gecko 520. Which i havent really gotten the hang of it that well. Plus the first course "Flow like water" just seems like its set up to make you fail. One point you have to brake to duck under a wooden object. Later there is a huge ramp and you free fall down and end up hitting the same type of wooden object. Maybe if i spend more time with it ill be able to do it better.
Adrenaline Rush - Medium - I got 100% in, four gold medals. For whatever reason this was pretty easy for me, and i dont even think i retried any of the courses to get gold.
Survival of the Fastest - Medium - I got 68% in that one, two gold, one silver, and one bronze.
Theory of Acceleration - hard - i got 50% in. Two gold, two silver, two bronze, and i cant seem to finish Aftermath. Whenever i get to that area where you jump up and gravity starts to pull you to the left of your screen, thats the part i get stuck at.
Unatural Selection - Extreme - Havent had a chance to try any of these yet. There are only three tracks in this course.
Skill Game Circus II - Medium/Hard - Havent had a chance to try these. There are only two, Adrenaline Cannon and Uphill Struggle.
But overall for 5 dollars i think its cool. I also seen there is a Bahemoth Knight helmet, so your head looks like the blue knight from castle crashers. Only 199,990 price tag.