For watching anime I believe KissAnime.com is the best!
They have a lot of anime's in fact I have never not found something I'm looking for. Also the video player is really easy to use like YouTube and I've never had issues with it (this is coming from someone that always has issues with players).
There's a few adds (like 3?) but you can always click Hide on them. What's best the website dims out episodes you've seen and highlights episodes you haven't so you always know where you're at.