The days when vegetarian isn't as hip, cool and people were not so aware of the tremendous health benefits of vegetarian food, these guys have been here making heart warming and reliable vegetarian food. It was a go to place for me, a vegetarian for more than 20 years, to relax and not have to explain what I don't eat. Their quiche, stew, and salads we such a stable. The place is small, and perhaps there are lots more vegetarian friendly places out there. But I gave me a home feeling, always going there at lunch time for a good meal.
They might have fewer choices each day, but their menu change pretty much daily. So I don't see that as a problem.
For those who don't like its basement, or small premises (don't forget, if it isn't so good, and vegetarian in higher demands, it won't be so packed!), I suggest you get take away (the counter is upstairs) for a speedy service. Go sit in nearly lincoln's Inn field, or around seven dials round about.
I would always go either very early or after the lunch rush hour has past. It will always be a place I have fond memories of.
Cons: Limited seating areas, Could have more vegan choices, Close early