I went here again and still think the food is pretty good. The Zack's special is my favorite.
The service is really fast, but it does get crowded at lunch so you may want to get there before 12.
There were a couple of things I didn't like about this visit. I ordered the Zack's special which comes with fries and I didn't want the fries, so I asked for no fries. They still charged me full price though and I would have hoped to get at least a small discount otherwise I might as well have gotten the fries and given them to someone else.
The seating is also not ideal for even small groups. The booths are really small so it's hard to fit more than two people in them.
The burgers are simple, classic burgers and they are good. I'll continue coming back when I'm looking for a good classic burger.