was no box-spring and the mattress was only supported by a couple of cross beams. The mattress really sagged in the areas with no support. The place was generally good so we left a decent review, but did mention the issue with the bed. Shortly after the review went up we received a retaliatory bad review on how we left the place a mess and it required additional extra cleaning (not true).
Since then I do a walk-through video of each place before I leave.