Ted Drewes is good, and I enjoyed my experience at Imo's Pizza. People will tell you to avoid St. Louis style pizza, but I think it's all about expectations.

For instance, if all you've ever known is Texas BBQ and you go to North Carolina and someone tells you there's a place there that has the best BBQ, you're probably not going to like it because you're expecting BBQ to be Texas BBQ. But if you figure out what BBQ is like there and eat it in that mindset, it's enjoyable. Same thing with this pizza. It's basically almost like a cracker with cheese on it. And the cheese is very different from regular pizza cheese. Read a little bit about it, and go enjoy it.