This is our favorite Chicago Harbor of the 4 that we have been at this week. Great location, clean and all the amenities. We again had the same issue as the other 3, with someone being in our assigned slip and having to move at arrival. I don't get it! The Chicago Park District forces you to reserve slips through the Dockwa app and then is very slow to confirm and respond, if they ever do respond. I called twice after making the reservation and was told the harbormaster was not in yet. This was at 1PM. I had to show up, and track someone down to find our slip assignment. Then we get to our slip and someone is in it. I picked the closest open slip and called to find out if I could stay or needed to move. I was promised a call right back and never received one. The customer service at every Chicago Park District Harbor is non existant.