We've stayed at the Royal Plaza twice and like it very much. First was in the wing room. Was perfectly fine for us-- coffee maker, nice big safe for our laptop, nice decor, great location, and good (inexpensive) restaurant. Our only problem with the stay was that the hottub broke down and we kept getting conflicting information about when it would be fixed, along with an attitude from the staff that went something like, "How the heck do I know and why would you care!?"
Our most recent stay was just a few weeks ago in one of the tower rooms. The room was huge and very bright and airy (until you pulled the drapes, of course). Still the nice big safe and coffeemaker, but now a pretty deluxe bath and nice sitting area. Service was pretty perfect this time-- water had to be out for a few hours to fix a leak, but we were forewarned via a note under the door and the repair was in the afternoon anyway, so it didn't affect us.
The Royal Plaza has become our first choice hotel at the World, because of the fabulous specials they run on rates. Our goal is to aim for $50 a night for accomodations and we were able to come close to that on both visits (the first was about $57 per nite and the second visit was $51.75 per night). They do have a $7 (soon to increase to $8) per night resort fee, which buys you a newspaper. This is the only very strong negative that I can express about the place (it is not a resort-- it has a very basic pool and a hottub-- this charge is completely unjustified). However, my most recent special including a waiving of the resort fee, so I know it is possible to stay without paying this ridiculous fee.
Beatnik
PS We only go to the World in the lowest of the low season-- so for the poster who is going in summer and getting a rate of $81/night that seems very reasonable to me. But watch the resort fee!