Full over full with single size trundle. Packaging was excellent. My husband put it together and was a little frustrated with the instructions due to the fact it is only pictures and nothing written.  Took him and his brother a couple of hours.  Size is as described and fit in the tight space perfectly.  Seems very sturdy.  Trundle fits perfectly with an 8” mattress.  I will be purchasing a couple of bunky boards for extra support.  The slats are a little bit too far apart and if adults will sleep there a little more support is required.  I did purchase all 8” mattresses and they fit well.  Might have gone with 9” for a tad more support for the full over full portion.  Overall very pleased.