Instruct: Classify the given review as either positive or negative.
Query: Self-deflates in less than 48 hours

This was rated the "Best Inflatable Bed" by Hammacher Schlemmer. Inflating the mattress was easy, but replacing the heavy gauge power cord into its slim compartment took almost as long as it did to inflate the bed. I inflated and slept on this mattress for the first time on Sunday night, then slept on it again Monday night. I woke up this morning (Tuesday), still in the middle of the mattress, with my butt on the floor! I guess this COULD be a good mattress if you didn't have to inflate it every other night. I'm returning it for a refund.I forgot to mention that I was unable to inflate this mattress enough to make it feel "firm". It reaches a certain point, then just STOPS inflating. If you look at the photo without the people on the mattress, you'll notice it looks "saggy" in the middle. Well, that's an accurate photo because that's as firm as it gets!