Almost 24 hours (in 2 hours it will be 24hrs) and the mattress is very firm and the coils can be felt poking through the top layer is very thin like very thin its like a sponge on top of springs if you lay on top you can feel them the card said to wait 72 hours will be back when the time is up and will update.

Assembling the box spring is fairly easy. I liked the box spring but will need to return it because the dimensions are smaller than the mattress so it hangs out on the sides. This box spring is 53x74x9 and the mattress is 54x75 so make sure that matches when purchasing.

I rate this box spring as fair because it was the cheapest king box I could find, and, you get what you pay for. The box itself is good, just tedious to put together. However, as all the other reviews state, the cloth cover absolutely does not fit. It tears very easily upon trying to get it zipped up and there is NO way that it will close properly otherwise. This was frustrating, time consuming, and upsetting. My husband and I attempted this task (of JUST zipping) for over an hour. We wound up leaving half of it unzipped and just placed a sheet over it to hide the metal. It's not really a huge deal to us but it's not right that the manufacturer doesn't correct this. We're hoping this box does not do any damage to our new mattress...

Box springs have... springs. This doesn't. It's a metal torture rack no different than every other cheap foundation made for beds today. Anyone born after 2000 probably doesn't even know what a real night's sleep is. Box springs have actual springs, not metal coils that don't move. Imagine the difference between sleeping on a metal slab and sleeping on a trampoline with give. Box springs have SPRINGS. This doesn't.

We had the queen 9" boxspring together for about a week. Today one of the center supports fell to the ground. It pulled apart somehow and does not go back as it should. Currently using zip ties to hold it together and adding more support underneath tomorrow.

I don't need multiple hours of laying this out and then assembling it (20 metal rods to screw together). To hold it while screwing rods together likely would have taken a second person to hold it. Two people x two hours minimum, not worth it. As soon as I took one look at the directions, I knew after committing time to assembly, it might not be right and cover might not fit, etc..... We sealed it up and returned it to Samsclub. I ordered another brand from a local furniture store (no assembly) and even with picking it up, it was surely less time than I would have spent on this.

I could be prematurely reviewing this, meaning it probably is a good a box frame. However, putting it together was very difficult. The directions coupled with the way the pieces were labeled were hard to read and the screws were very finicky when assembling, even with a drill. So again, my rating is not based on the quality of the product but rather on the assembly.

Solid

We put together 4 of these in less than 1.5 hours. They included everything needed such as a mini socket. They seem to be very sturdy.

This is high quality, easy to assemble, very well made. My husband said to rate it 5 stars, he doesn't say that for anything!