I did a flywheel class once. They score the class in what they call power (really a fake unit of energy or perhaps energy run through an equation blender), and it gets annoying hearing ppl talk about how much power they did in random numbers that have nothing to do with power. But it was fun to win the class on my first try lol. There were several other dudes there who made me have to push a bit to "win".
Haven't been back, but I don't live in an area with winter, nor do I ever intend to train indoors. Seemed worth it for some indoor motivation. The particular instructor had good music as well. The shoes sucked.