Given the task definition and input, reply with output. Given an Amazon review, indicate whether it is a 'Positive Review' or 'Negative Review'.

I purchased this case and was very dissapointed. The iPad kept slipping out of the case when it was in the viewer position. I contacted the seller and they refunded my purchase (they were very timely). I ended up purchasing the Tragus 360 case and have been very pleased with it.
Negative Review