We stayed here on an anniversary getaway. Loved it! Super well maintained, friendly and homey. Lots of little touches, like coffee/tea basket, etc. Felt very thought-out and not like an after-thought rental like some we've stayed at.
There's not a lot to do in Portage itself, but it was an easy drive to Devil's Lake State Park and Mirror Lake State Park for hiking which was what we were planning on anyway. Apartment was perfect for the two of us. The kitchen counter space is tight if you're making all your meals like we did, but it's manageable. Would definitely stay here again.