Solid bed - no bunkee board or additional slats needed! It's taller than most platform beds but I'm really happy with the overall height.

I assembled myself in just over 2 hours. A few spots where I ran into trouble: some of the holes didn't line up super well on the frame pieces so I had to hold it in place while I assembled. There were a few slats that were tricky to drill into place - even using an electric drill. The instructions aren't great and none of the screws are labeled but it was relatively easy to figure out which pieces went where based on the diagrams.