I work rotating shifts so sleep quality is the most important factor for me when choosing a mattress.After two weeks I find my Helix Midnight Elite full size mattress to be extremely comfortable and I believe it was the right choice for me. The mattress had about ten days of sitting around outside its packaging while I was waiting for my new platform bed to show up so I noticed no off-gassing smell. The two pieces were easy to put together and most importantly for me as a side sleeper it is the perfect balance of firm but plush.