Definitely not my favorite place to stay when at WDW, but it is very clean, safe and cozy. After doing a bunch of research online I was able to get a room for just under $60 for late 2006. (True, it was a 2006, but you get the idea.)
If I were to recommend a cheap hotel to friends going to WDW and I had the option of either choosing the Royal Plaza or one of the All-Star resorts, I'd recommend Royal Plaza if they're looking for a quiet place......but All-Stars if they're taking kids and don't mind some of the extra noise.