We purchased the Purple Plus king with base to replace a standard inner spring mattress. My wife has had 5 back surgeries, two this year and we needed help for her to rest well. Although there were delays in shipping, the base and mattress were very easy to set up. The very first night my wife was sold and slept better than she had in a long time. It took me about a week to adjust to the mattress but I sleep very deep and am extremely rested in the morning. Thank you purple!