I was suffering from severe back pain due to our old mattress, and being pregnant made sleeping at night really uncomfortable. That's when I decided to order the Flo Ergo mattress. Because of my back pain, I couldn't open it myself, but my husband easily set it up for me.
I've been sleeping on it for a few days now, and it is incredibly comfortable. My back pain has reduced significantly. Now, I can comfortably sleep on my left side without any discomfort.