We purchased the split base, the mattresses do not stay on the bed. Absolutely horrible. Also very uncomfortable mattress. Called during the refund period to return and they just keep saying they will pick it up. They sent us an email that they would refund everything except the shipping but now we can't get them to pick it up. They are now saying they will refund the mattresses only. But the split base is an absolute nuisance. I will be surprised if they ever show up. A month ago the email said they would call us but so far no return date. I am so beyond frustrated with this company!