We really enjoyed our tour. It was just the right length, was a nice walk, and we got to see a lot of great street art. We had a small group (5 total + guide) which was also nice since we got to chat a bit with the guide, and each other, and ask questions. Our tour guide, Brian, was very knowledgeable and personable. We're Chicago locals but still enjoy taking tours here to appreciate things we might pass everyday. I would recommend this to other Chicagoans, as well as tourists who want to do something a little bit different.
One things to note: I saw in the tour description that this tour isn't handicap accessible, but I generally disagree with that. We didn't go anywhere that a wheelchair couldn't go, provided the user is used to using their chair in an urban environment (sidewalks, alleys, and on the 606 - but there are ramps). I recommend reaching out to the tour provider to ask questions about this if it applies to you.