This is a VERY VERY average restaurant.
They should be humble as their pies pretty much suck. Gourmet? No way.
I have been here a number of occasions as it is 1 block from my office. The Pizza, which should be the star of the show, has always disappointed on the 3-4 times we have been here.
Crust does not have any depth, they are generally not cooked long enough, and I would rate the pizza here about a solid 5 on a good day.
If you are seeking this type of a chain restaurant, then a visit to any of the many Grimaldi's locations would be a much wiser choice - the pies at Grimaldi's are a solid 8+, with a crust which blows Humble Pie out of the water.
I never understood why Humble Pie has stayed in business as their Pizza is just meh. Not only are they staying in business but the owners are aggressively trying to expand through the valley. Well all the luck guys as your food needs a vast improvement. The soggy, bland crusts here(I predict) won't stand the test of time.
This chain seems to cater to the Yuppie/kiddie "California Pizza Kitchen" crowd who may be seeking a happy hour or tasteless food, and may not be as picky about food quality. Cool with me I guess. But please don't call this very average place anything more than what it is.
Ambiance? I don't care - there are many restaurants in Phoenix which look like Humble Pie with the typical bar and pseudo pizza oven.
Humble Pie is a "flash in the pizza pan" operation. Avoid.