The OMF Mattress can be flipped and turned.
Wife did not want Memory Foam.
I picked the last one on sale from Costco… this time the decision was hers.
I’ve had good luck with the Original Mattress Factory over the last few decades, but sadly, we moved and no longer live near one.
Ah, thanks! Mine is long overdue to be flipped / turned!
It’s cause we spend one-third of our lives on them. And it’s an important one-third.
That explains why people are picky about their own mattresses. It doesn’t explain why people get defensive about mattresses other people sleep on.
Mattress envy? Mattress prejudice? … I agree that worrying about the mattress others choose to sleep on is a tad weird… unless it’s your spouse/significant other and you’re forced to sleep on it… 
Today is Cyber Monday and there are great deals on the main box beds. I have wanted to buy the original Tuft and Needle mattress. Today it is 40% off. This is the lowest I have ever seen it. It has a 100 day trial period that you can decide on keeping it or not. I pulled the trigger 
I ordered my mattress online. It was quite easy. It came vacuum-packed and rolled by UPS. There are several very reputable companies out there- Avocado, Birch, Brentwood, Latex for Less to name a few. Many offer a 1 year sleep trial, unlike physical stores whose trials are much shorter. All you do is open the box that comes by Fedex or UPS, and unroll the mattress onto your frame. It inflates once it hits the air. If you don’t like it after your trial, most companies just refund your money and ask that you provide proof of donation (you have to donate it yourself). Unlike what Clark said on air, there are plenty of non- memory foam beds available online. In fact, you can watch mattress videos on youtube. Most of the videos list a discount code in the description to save you further money. Avocado mattresses are rated #1 by C R for all but petite side sleepers. I had an expensive adjustable base Sleep Number bed for many years and didn;t like it at all. Plus, they have classic customer-no-service!
I agree. Sleepolis is a good review site. What you didn’t mention is that they, along with most review sites, offer a discount code. Two of the beds I tried had a full year trial period. But, in this day and age of COVID, if the bed didn’t work out, I was instructed to donate it myself then send them proof. I have found that a lot of the time, the firmness rating of the beds given on youtube is inaccurate. Also, a little trick is that if you contact the company before your trial ends to tell them you’ll likely be returning the bed, they’ll likely send you a free pillow [or 2] or a topper to help you determine if that is the true problem.
You might try a latex mattress. They come in 2 different types of latex as well as a hybrid format and do not sag.
I would warn everyone about buying a Tempurpedic mattress. They do not honor any warrantee claims, and will simply ignore any claims or complaints. Do a google search and you will see there are rampant stories of how they simply ignore people with issues. We had a mattress which sagged within a year of purchase, and they would simply ignore any warrantee claims. Come to find out that this is their busines model. Stay away!