I might be biased since I have lived in Milwaukee all of my life, but UWM was/is the perfect school for me.
The campus is extremely large, but keep in mind this is mostly a commuter school, so it doesn't always seem like it. Though UW-Madison might far better academically, the location of UWM can't be beat. Located right near Lake Michigan, you are right on the trendy side of the city and right near downtown, with all it's bars, restaurants and other attractions.
Academically, I am sure it must vary by program, but I found that it suited me perfectly in my degree areas of English and Mass Communication.