I bought a larger bed frame and did extensive research to find a Cali King size mattress that was as comfortable as my previous set up. (A Serta firm coil mattress with a tempurpedic mattress topper). It was hard to find objective customer reviews online (I imagine Winkbeds only posts five star reviews on its own website). I chose a firm Winkbed mattress because of the great Wirecutter review.
Unfortunately the mattress took 15 days to arrive, and was so uncomfortable- like sleeping on concrete. It gave me severe shoulder pain, to the extent that I had to go to a chiropractor, physical therapist and MD multiple times. I didn't realize it was the mattress causing it until I slept on my old mattress in my guest room for a couple nights and the pain disappeared. The mattress was also so heavy that I could barely lift a corner to put sheets on the bed.
I requested a return. The rude customer service agent told me I had to wait 30 days to return it. I waited, it didn't improve, so I again requested a refund. The rep convinced me to pay $50 to upgrade to a luxury firm as a replacement, instead of getting a refund. I asked what would happen to the returned mattress since I'm concerned about environmental waste. The rep told me it would be donated. Two young kids came to pick it up a few days later, and dragged the mattress down the street. I asked what would happen to the mattress, and they said it would be destroyed, go to landfill, or maybe be cleaned and re-sold….
Winkbeds sent me the wrong replacement! It seemed like the same mattress and the tag said "firm." I sent a pic to the rep and he said it must have been mislabeled, and to check the manufacturing tag. It turned out not only was it a firm, it was also a King size mattress. Not Cali King.
I had to go through the entire return process again. I purchased the mattress on Feb 14th, and didn't get this resolved until April 26th. My shoulder and back pain got so bad I couldn't pick up my baby girl. The worst part was that the customer service reps never apologized once or acknowledged their error.
I ended up getting a Serta firm and Tempurpedic topper in Cali King, and it's amazingly comfortable. Wish I'd done that in the first place.