Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Loses air

I am very disappointed in this air mattress. I paid the extra cost in order to get a Coleman thinking I was buying quality; however, I have had it three weeks now and am STILL having to reinflate every other day. I allowed for the "stretching" other customers have alluded to, but I have a long- term guest sleeping on it and think the stretching should be done by now! I am going to return to Amazon, I believe; but am caught between a rock and proverbial hard place ( the floor! Ha ha) because my guest is here for another six weeks.