We purchased the queen size which fits a queen-size mattress perfectly and because of the frames 16” height (we are all tall and most furniture is made too low for us). The entire outer frame bolts nicely and securely together. The horizontal slats are spaced about 3 inches apart and slip in the side holes over a metal pin, which we found difficult to get both ends in, but finally seceded hopefully they will stay in place. The frame seems like it is strong and will support the weight of both the mattress and sleeper, overall I give 5 stars for the quality – 1 star for the slat assembly.Well for the price it’s okay. U can see in the photo how my full sized mattress doesn’t cover the whole bed frame because I accidentally ordered a queen . The issue is that this bed is not stable on it’s own. The metal bars that go across the bed don’t come with anything to secure them in place and some of them don’t even fit in the slots designed for them so I had to pick some gorilla tape up from the hardware store. After securing it myself with the tape the bed is a lot more stable and I sleep great on it.Easy to put together I assembled on my own while 6month pregnant. Only complaint is even with bolts tight it does wobble a bit.Assembly was easy except the metal slats that hold the mattress are a little cumbersome. I’m finding that after sleeping on the frame, some of the slats easily pop out of place and I have to keep lifting my mattress to put them back. Hopefully, there is something I can do, not fun. Otherwise, very sturdy and love the storage. I have the 16 inch.When I assembled it. I put some of the main frame pieces upside-down, as some small teeth where not clear in the assembling manual. Everything worked fine until the end when all the crossbars could not be kept in its place, so I have to redo it.Be carefull that the first pieces have some teeth that let the crossbars (last pieces to be assembled) to be kept in the right place.Good for the value. Unfortunately, this bed frame was a few inches longer than my actual mattress which stinks because the extra gap doesn’t look the best and takes up unnecessary room. Not sure what the reason for this isIt was easy to assemble, it’s very sturdy and it’s comfortable to sleep on. There’s plenty of storage space under my bed .Some of the crossbars were not easy to get into the frame