Perry's place is good for a stay outside of the downtown area. The space is roomy and is as shown in the pictures. Communication is very responsive and they provide great instructions for checking in. There is keyless entry, so easy to get in and out. The kitchen is fully stocked, but minimal pots and pans, if you are planning to make any meals there. There is minimal natural light as only a couple of windows that are up against brick walls.
I would say unless you are a really fast walker, it really is about a 10 min walk (.6 miles) to either blue line stations. the 72 bus on North takes you to oldtown and is only a 1/2 block away. Look for the elevated walkway (606) on Bloomingdale as that is a nice place to walk, jog or bike. There's a grocery store Go Grocer about 10 minutes walk on North Ave. Milwaukee has most of the shops, restaurants, etc. We spent most of our time downtown so did a combination of Blue line and Uber/Lyfts, but generally about 30 min on public transit and 20 min by car.