When first received it inflated quickly and remained inflated overnight with no issues. I used this as a guest bed for my spare room for visiting family, nearly 20 uses in a year total. However after a year, I noticed the mattress was deflating more then halfway overnight, yet I could not find any air leak even with someone lying on the inflated mattress. My conclusion is the electrical pump's one way valve wore out. I checked on repairing the pump and the cost was more then double the cost of a new air bed.