Another thumbs up for the guy, Josh, who runs this shop. I spent 20 minutes or so picking his brain on Friday after work. He seems like a great guy. Josh used to be a teacher before getting into beer and as such, hopes to do some more advanced classes for homebrewers, particularly on water chemistry. I told him it was a great idea.
I like the gravity feed system that they have for the grain. It works much better than Hopsters gravity feed setup (at least from what I remember when I visited there) and Modern Homebrew doesn't have one at all.
I can't comment on the selection or pricing, because I was there for very specific local ingredients in Four Star hops and Valley Malt, so they were going to be priced higher than normal grains anyways.