I've been to the Pig & Duke a few times and it's been a positive experience. I wouldn't say it's terribly special, although they do seem to be trying. I will say, however, that compared to many of the other pubs we've gone to after 40k night, this one is way , way better.
The food is good, although I imagine that foodies might be disappointed. They try to make the presentation really fancy, but it tends to go a little overboard. Some of the salads are literally a big hunk of lettuce, which is odd.
The service has been good, although the servers don't know everything about the alcohol served there. The best thing about this place is the ambiance and noise level. It's a nice place to sit in and you can hear the people around you; this is something a lot of pubs are terrible with.