Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Comfortable while it lasts

I've had this Aerobed Premier DuraSuede Air Mattress for just over a year. It got used once a week, on average. It was (and is) comfortable. However, it now has a slow leak, which means it doesn't stay inflated for an entire night. My understanding is that it has a one-year warranty. One reviewer also reported his mattress developed a leak just after the warranty expired. Ironically, it looks very well constructed. From other reviews, it appears there is a leakage/ballooning problem with the product (though mine exhibited no ballooning). It is said in one of the reviews that the pump has a 3-yr warranty. Had the mattress lasted that long, I'd have given the mattress a 4-star rating. It fills and empties very quickly, is quite comfortable, and "folds" up nicely. But its durability--the very thing you buy it for--is questionable.