I have a Nectar mattress and I’ve slept on a Purple before! I have no complaints about my nectar, find it very comfortable. The pillows they send with it though should go straight in the trash, they FUCKED up my neck after a couple weeks on them. Purple was a forgettable experience for me, I think I prefer memory foam over what purple does
EDIT: here is the mattress in case you're curious. I bought one for our guest room and everyone who's stayed with us love it. Anecdotal, but I really like it.