This wooden box spring was exactly what I was looking for our new Memory Foam Mattress. The brand, as most of them, requires wooden slats bed/box spring and distance between the slats less than 2.75". There you go. 
I purchased it on sale, it was CAD 400 for a King size. 
The delivery was not happy experience though,  it took a month to get it home, thanks to the great Wayfair customer service, but the product is great, easy to assemble, just screw the 4 corners of the frame,  pull over it the pre connected together by a ribbon slats and attach them by V****o to the frame. No squeaking so far, the cover fits well (a little tricky to put it on, but my husband and me made it). No smell, the zipper of the cover is good, no any issues.  Happy customers :), we have got completely natural bed and box spring. 
I would definately recommend it and would buy it again.  
Thank you.