My wife and I have previously stayed at the Sheraton and the Marriott on Canal Street, several times each. Both hotels were nice enough. This year, we decided to try the JW Marriott because they were offering upgraded, larger corner rooms.
The rooms at the JW were definitely nicer than the rooms at the Marriott or Sheraton. The corner room was huge, clean, and well-maintained. I liked that this hotel was a little quieter and less hectic than the Marriott across the street. The staff here were all very considerate and friendly.
The beds were a little too soft, which was not good for my back. But I can't hold that against the hotel.
We arrived late on Saturday. Check-in took awhile because there was only one person at the desk, and he was on the phone for about 10 minutes. But the concierge was kind enough to "small talk" with us until we could check in. Our room was supposed to include two complimentary beverages at check in. The man at the desk could not find the redemption vouchers, and promised to put a $50 credit on our account to make up the difference...he forgot to do it (as I found out later at check-out), but the front desk quickly removed our bar tab from the bill to remedy the mistake.
Overall, I think it was a well-run, well-maintained property, just across the street from the French Quarter, at a reasonable price.