One of the most fun multiplayer games that I've ever played. While I may have 9 hours on Steam at the time of writing this, I had a lot more time on my console, so I can understand what I'm saying.
The best way to experience this game is by playing with friends. The thrill of trying to survive against each other in a wide variety of maps with some optional modes is unforgettable, I still giggle whenever I think about some of the moments that I've had in this game with friends.
Quick Play can be pretty harsh, mostly everyone there has already developed the best techniques to gain high speeds in milliseconds so I did not have the best time in that mode, but I have found a few casual players every now and then that were fun to fight against.
The Campaign can be pretty thrilling to play. While yes, I was racing against bots, it managed to be pretty intense every time with Unfair mode. I go back to it sometimes, which I can't say for most of the games that I love in my library.
Basically, the best way to play this game is by playing with friends, Quick Play can often be hell, and the Campaign is very thrilling even if you are playing against bots. Would absolutely recommend getting this game if you see it on sale.