First off I'll say that Mark is an excellent host - great communication and problems were resolved quickly and professionally.
The hotel room, unfortunately, was not really up to standard. Most annoyingly, the concierge staff were either rude or disrespectful to me. The room is very old and needs serious renovations - the windows are not nearly good enough to keep any sound out, meaning the nightclub on level 2 can be heard throughout the night. The AC is old and loud, and doesn't really cool the room that well, and the curtains don't block the light - so not really great for sleeping.
The location is good, of course. But so is everything else in Waikiki. If the room had been cheaper, this wouldn't be a problem.