Stayed for 3 nights while attending a conference at the Midwest Center in Milwaukee. Though the hotel is definitely a little farther from the Midwest Center (and Bradley Center) than more centrally located choices, the 12 minute walk is worth it for the savings.
Despite being ranked a full star below options like the Hyatt, Comfort Inn's rooms were very clean, spacious and even had a newer, nicer TV than the Hyatt. Water pressure and temperature for the shower were also good.
Only small complaints: continental breakfast was tasty but could be kept slightly less messy. Also, the elevators are painfully slow.
Would definitely recommend overall.