Went several times for lunch with my work, and i found the food not really good for the price. The quality is really average (the last time i had a gammon steak - which was really dry with an egg and fries).
The place is nice though, and they have a large choice of wines. I will recommend better to go there for after work drinks rather than for lunch or diner. Their cider is good as well and they have a good beer range.

Right off the Holborn tube stop, this All Bar One should be avoided. Why go to an All Bar One hole anyway when the Pitcher and Piano is a minute away!