I cannot state enough how much I love it. It's both an art and a science. It involves danger. It's exciting. The community is absolutely insanely great. It allows me to progress both through ladders set up by organizations, and by my own recording of lap times. I can compete as hard as I want or I can just go out there and turn laps at 7/10 and no one cares.
It keeps the body loose. I like to go right after work so all of my bad desk posture gets stretched out of me.
It's a lot of fun, and a great way to socialize while working from home.