I'm just posting in hopes of helping someone not make the same mistake we did. Rob from the Robuilt YouTube Channel and Co-Host of the BP podcast has been pushing the Zinus Mattresses for a good time now. I actually really like Rob and figured a recommendation from him would be solid. Sadly, I think Rob is just another 'influencer' pushing things that have affiliate links without properly testing them.
We bought 4 of these mattresses off of Amazon for 2 MTRs we are spinning up right now. We always test mattresses so we were using one of them for about 2 weeks. The first 3 - 4 days we had them we thought they were pretty stiff BUT we slept great! Everything went downhill after that though. We both had constant back pain, the mattresses are like laying down on a rock and then you slowly sink into them. Once you are sunk in if you tend to move at all while you sleep you are going to be extremely uncomfortable as half your body will be in a hole and the other half will be trying to figure out what is going on. We went and bought all new mattresses from the local store and my wife resorted to sleeping on the couch until they arrived the Zinus mattress was so uncomfortable.
I honestly can't fathom how anyone running a hospitality business would think these are a good mattresses for their guest. Maybe because a lot of AirBNB stays are shorter they are able to get away with it. I dunno.
Anyway, Amazon wont return them so we are going to donate them - but I kind of feel like a horrible person even doing that and making someone think they are getting a windfall and then having to sleep on this horrible POS.
That is all. I hope everyone is having a wonderful holiday.