Overall, I had a very nice time on this cruise. We had none of the problems cited by other reviewers. The toilets all worked, there were no strange odors, and the air conditioning worked. Actually, the air conditioning worked a little too well and I wore a light jacket onboard as I found the ship chilly!
General: There are pros and cons to Freestyle Cruising. We never saw our cabin steward, but the cabin was kept clean and whenever we stopped any random steward in the hall to ask for more towels they were promptly and pleasantly given to us. The catch is that on a cruise where you know your steward and the tip is not automatic we would've only had to ask for extra towels on the first day and then would have gotten them automatically.
If you are sailing on the Sky don't forget to take an extension cord. The bathroom and the desk each have only one outlet. We always carry a Power Squid on our cruises so we have plenty of outlets on the desk for cell phones, cameras, etc.