I've been there quite a few times while living in Beijing last year, but whenever I visit Beijing I go there every time.
The menu is great! Very organized, varied, has pictures, written in both english and chinese, it also has symbols for how spicy the food is and how much it will take to prepare.
Among all the times I've been here, there was just one or two dishes I didn't really like. Everything else was so, so good!! It's totally the place for you to impress your meat-eating friends! I recommend you to take many people with you so you can order and taste more things on the menu ;)
No matter the time of the day, you might find it full and sometimes you will have to wait for a table, specially over the weekend. The staff is very friendly. I'm not sure if they speak english though, since I've only talked to them in chinese.
I'm visiting Beijing in a week and I can't wait to go there again! I really love the food~