This bed was relatively easy to put together and the end result looks pretty good. It wasn't a 5 star purchase for 2 reasons: 1) the grey color is quite a bit darker than what is pictured -common theme among upholstered furniture on Wayfair it seems; 2) the support slats are quite flimsy. We are looking to replace them, which is an unexpected expense.

For the trundle I definitely recommend an 8inch mattress and, for the top we got a 12inch and they look/ fit great.