I have been there twice in the last two months for lunch during work and it was very good. I got the Rueben Briggsy both times and that is some tasty corned beef. Also their homemade chips are really great.
The only downside for me, as an asthmatic, is the fireplace. While I love the ambiance it provides, they put peat on the fire and it takes me a good 15 minutes to get adjusted to the heavy fragrance. As long as I have my inhaler, I'm solid.
If you like Hogwarts and anything English / Old World you will really love the large stone fireplace and the overall feel of the restaurant. I'm even looking into throwing a birthday party there :)