ZINUS 14 Inch SmartBase Tool-Free Assembly Mattress Foundation - Metal Platform Bed Frame with Sturdy Steel Construction, No Box Spring Needed, Underbed Storage Space - Perfect for Twin Size Beds in Dorm Rooms, Guest Rooms & Small Apartments (Black)

This Night Therapy Sleep Revolution metal bed platform is pretty darn solid.I bought the California King and put a memory foam mattress onto it.Setup was easy (probably took me half an hour and all of a beer), the california king comes in two pieces (each looks a bit like an oversized twin) that are held together with wing nuts.I had no problems using this except for one which I expected based upon the other comments. The one problem? The feet squeak (really, it's more of a stutter) on my hardwood floor. So far this does not sound like the high-pitched metal-frame scraping of cheap beds but, instead, the rubber feet stuttering across the bare hardwood floor. I have bought some stick-on felt pads and I think they will cure this (if they don't, I'll come back and update this review downward).Everything else has been just about perfect. My whole family has piled on this thing, and my kids have used it as a trampoline (with only about a foot of memory foam on top of it) and it's stood up like a champ so far.I don't think this frame adds or subtracts any comfort in the sleep, and I haven't really felt any of the bars through the mattress (although the edge-support is slightly better than what I'd expect from my foam mattress); however, the space under the frame is very useful, and the frame itself seems extremely sturdy, especially for something so light.One or two commenters mentioned the toe-breaking middle legs. This is true, the middle legs are flush with the sides of the bed, but are basically invisible while making the bed, so, they are very easy to kick accidentally. Still, it's hard for me to blame the frame for this. It's more of a matter of getting used to where the (necessary) legs are hiding under the mattress.