I've been here twice and have enjoyed my time both times.
Food: Big Ben has most of your standard bar-food-type offerings with a few British foods as well. I could go on, but I imagine that most are here to drink, not eat.
Service: Both times I've been, the service has been great. It did not take long to get our food and drinks, and our server was pretty good at making sure our glasses were full.
Price: The prices are in line with most bars. $10-$15 will get you most of the entrees. Beers and other alcohol prices were also in line with most bars.
I would definitely return.