Instruct: Classify Amazon reviews into positive or negative sentiment
Query: OK if you're looking for a disposable mirror

I have had several Zadro fogless mirrors so that I can shave while in the shower. The key word here is "several". They all became unusable after a few months. The coating used to keep the mirror fog free just does not seem to last. The bottom line is that these things are alright if you know going in that they will need to be replaced in fairly short order. For that reason, buy the cheapest style you can and skip the more expensive ones with radios, lights, etc. built in.