Ad blocking works well now, though it doesn't do much to block tracking and analytics. I don't use Web much, so I can't testify to whether it feels fast, but version 44 is supposed to have some big performance improvements. When I put it through BrowserBench it did better than Firefox on JetStream (web application performance), but it got badly beaten in MotionMark (animation and rendering performance). It does play YouTube videos now! I'd give it another go if you were interested before.