Instruct: Classify the given Amazon review as either positive or negative.
Query: Dangerours; be very careful

Took this brand new unit to Switzerland recently. On first use, got very hot, partially melted and blew fuse. Was NOT overloaded. Replaced fuse, plugged into outlet with nothing plugged into it. Overheated and melted the case. If you buy, keep an eye on it whenever it is plugged in.