Instruct: Classify the given review into positive or negative sentiment.
Query: Great but easy to lose

This is a great product, extremely durable, waterproof, and super fast. I like it so much that I'm here buying my second one, even though I now know there is a flaw -- the case is very round, and if you drop the device on an inclined surface, it will roll away. That is how I lost my first one, by dropping it in a parking garage. Probably keeping it attached to the included dog-tag style chain or something like that would prevent this problem from happening again.