Absolutely LOOOOVE this bed. It’s the perfect size for my almost 5 year old. 
I put it together by myself and it took probably 6 hours to do. Would have been easier for some parts to have two people for sure but definitely possible to do solo. 
The wood is solid and heavy which is hard to find these days. I laid on the bed with him last night for a bit and it held both of us with no problem at a combined weight of 230lbs. Just didn’t use the ladder to get up because the wood creaked and I didn’t trust it lol
The little fort under is absolutely perfect. 
We did have a 12” mattress from his last bed that we put in here for the night until we got him a new 8” the next day. 

Definitely recommend this bed.