Boiler House's brunch is expensive (I believe it's $25 flat) but the amount of food you get for an enjoyable, relaxing experience is worth it for a treat once in a while. I often head to Boiler House for a "group" brunch as it's one of the few venues in the city that's large enough to accommodate larger crowds without the feeling of being rushed or monopolizing half the dining area.
The staff is attentive and courteous but it's basically self serve from the buffet table - they're there if you need them, but otherwise you are left alone to enjoy your meal. The last time I was there I wanted to take an eggs benedict from the serving platter but they all had peameal bacon on them (I'm vegetarian). The server offered to make a fresh one from the kitchen with tomato and avocado instead, and personally delivered it to my table. Very impressive!
Boiler House is best for a drawn out, lazy Sunday morning brunch experience - not for something quick and no-frills.
Watch out for the mimosas...they're really tasty but they add up quickly on your bill!!