H2R is the largest English hentai website in the world.
As soon as the page opens, you will see the high-quality content which is best described as "outstanding" - I really love it.
The only real downside is the popup which you get every time you go there - but only the 1 click. Afterwards, you won't have any more popups.
I'd recommend to check out the most popular stuff from the main menu. Then you just pick one of the original or doujinshi by clicking the name (the artist who made it is mentioned as well) and next to some more basic info you can open the reader.
It is easy to use and fast as hell. I love it.