Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Not reliable

Its difficult to roll the mattress small enough to secure it with the straps. The second time I used it I was following Texsport instructions to get the excess air out by rolling it up with the valve open and then again with the valve closed until you got close to the valve. While doing that one of the tuffed spots popped causing a leak. I patched it but havn't tried using it again and I'm conerned about reliability now. Since I was following Texsport instuctions I consider the problem a manufacturing flaw, but since I don't have the box any more and there was no warranty info provided, returning it for a replacemnet doesn't look like an option. I would look else where for a better product.