My only complaint is that it doesn't encourage enough innate curiosity. I am disincentivized from clicking on some things precisely because their recommendation engine is so tightly wound that I'll get bombarded with really tangential content for days or weeks after. Let me click a few videos about a topic before assuming I'd been hiding a lifetime passion for '80's John Deere combine trans-axle repairs that I need itched almost exclusively to within an inch of its life, all because I thought that guy in the thumbnail might get squished, and didn't adhere to my better angels. Besides that, it's pretty, pretty neat. Not great not bad. I can recommend farm machinery repair YouTube--it is a vibrant community of delightful weirdos and incredibly smart folk who talk about software more than you'd think.