Instruct: Classify Amazon reviews into positive or negative sentiment
Query: expensive for a less than one year usage

I have been using wet dry panasonic shavers since more than 15 years. Unfortunaltely i bought about 10 of them! the reason i keep buying them is that i need to use them under the shower, and they are one of the only brands available. but after 9 or 10 months they just stop working. this last one was more expensive and died in 17 months.are they programed to last just not too long??