I purchased a 32 ounce growler of Sierra Nevada Narwal Imperial Stout. It's surprisingly good, considering it's made by Sierra Nevada. The staff went out of their way to make me feel appreciated and gave me a walking tour of the place. Which was fun because it's 30 feet by 20 feet in size.
They have 4 and six packs in refrigerators, as well as a large selection of "build your own six pack" beers out on the floor.
The dudes at Cornerstone also said they would look into finding Affligem Dubbel for me and possibly stocking it. It's my all-time favorite beer.
They also sell my brand of cigarettes, so basically they are my favorite shop.
So ends the mini-review of my first experience at Cornerstone Craft Beer and Wine.