I also have reservations at the Breakers Express, May 23&24. $59 is a GREAT price, cheaper than anyone else I called for that week. It sounds like a decent enough place...
As for where it is, I was told on the Causeway, across the street from McDonald's. If you haven't been to Cedar Point I guess that doesn't help, though :)
For CoasterMania the price went up to $99, so I'm staying at the Best Western instead (almost as close, and cheaper). $99 once the season kicks off is really still a pretty good deal, though...