I'm strongly considering as well. I applied to Twin Cities, MIT, Caltech, Berkely, Princeton, UMich, and of course UChicago. Out of those MIT and UChicago are my top choices. Allow me to explain.
UChicago has a reputation for poaching the best professors. Dr. Tirrell who founded the institute is no exception. He was the dean of engineering at UCSB. On top of this all of their professors are not new researchers. They all are well established and well known. My undergrad mentor specifically recommended the program to me as one of the best programs. Sure their is some risk as it is a brand new department but that also has quite a few benefits. All the labs are brand new, everything is well funded, they are offering very good stipends etc.There is also something very appealing about the idea of being a founding member of what could be one of the top programs. I'm visiting for sure. If you want to talk more feel free to pm me and I can give you my email.