Helix Sleep Mattresses Personalized/Customized (with Dual option - different specifications for each side on queens and kings) & a 100 night guarantee
Current referral deal:
$50.00 off your purchase and a $50 Amazon gift card to the referrer
My Link:
http://share-helixsleep.com/x/Vrx2dv
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Some general info (we've owned one for around 6 months
Price ranges from $600 to around $1200 and they have a 100 night in home guarantee (no cost - you donate mattress and get a full refund.)
We are both extremely picky sleepers and have very different needs/preferences (have a King Dual) and LOVE ours - with a little tweaking to our first order which was pretty painless. General recommendation is that it is slightly firmer than expected so anyone preferring a softer feel would want to go one or two levels down/softer than you might think.
Happy to answer any questions on the customization/selection process.