It's hard to find honest reviews on the Casper Wave. The only ones I found, until now, were from affiliated websites who get a commission when they sell the mattress.
We ordered the Casper Wave. I had heard so many good things about how it supports your back. Every night we slept in the bed, we woke up stiff and sore. The last night I slept in it I had to get up and sleep in my recliner. I've had back surgery, so a comfortable bed is a must. This just wasn't the bed for us.
I've called Casper to pick it and the platform base for the bed up. I'm hopeful they will arrive on time and issue me a refund.
Bottom Line: No, I would not recommend this to a friend