Instruct: Classify Amazon reviews into positive or negative sentiment
Query: NOT airline approved

Buyer beware - apparently, these are NOT approved by all airlines, at least not for transport to Hawaii. We bought two of these to move our cats with us from CA to Hawaii. We chose these because they said airline approved, and had positive reviews. We even bought the darn air travel "kits" to go with them. Sadly, when we got to the airport for our one-way flight, United refused to accept the carriers, saying they don't accept carriers that have plastic fasteners!!!! My poor husband had to reschedule his flight, find a place to stay overnight that accepted pets, and find new carriers - and he had to do it with no car, just cabs. What a fiasco!!! Don't gamble on these if you are traveling with your pet. It just isn't worth the hassle - not to mention the extra stress that our cats had to endure!!!