I have had a Beautyrest for the last 15 years, it was time for an upgrade.  I was a little nervous buying online, so i went with mattress that met my needs, had the most positive reviews, and almost no negative reviews, ie this lucid 12" hybrid mattress.  I have a bad back and I sleep on my back, side and stomach.  The mattress is a winner, oddly it is firm,supportive, and soft at the same time.  I literally look forward to the comfort of this mattress.  I don't feel my wife moving next to me.  I also use to have a foam topper on my old mattress, which was too soft, trapped me in, and made it hard to move, so I really considered an old-style spring only mattress, this lucid mattress had none of that.  It wouldn't be a stretch to say this is the best mattress I have ever slept on.