First off: The ordering process is very easy and shipping at least for me was very quick. 
 Assembling the foundation was simple, I was able to put it all together with a power drill in about 20 minutes. However, the foundation itself is kinda flimsy. I'd reccomend buying at least a bed frame for your ghost bed as well. 
The mattress itself is comfortable if you like a firmer bed. It doesn't get too hot like other memory foam beds that I've tried. I feel supported and I sleep pretty well. 

Mattress I'd give it a 8.5/10 (only if you like a firm bed)
Foundation 6/10 (A little flimsy, but it's fine as a box spring)