Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Great filtering - inadequate filter mount

I purchased two Pur filter mounts in the space of one year. I've given up completely on that system and moved to pitcher filtering; a simpler and cheaper solution. The gasket inside the mount appears to have been designed to fail over a short period; usually within a year. Examination of the gasket reveals a material that disintegrates over time as faucet water washes it away. This is quite evident while in use: as much water escapes from the faucet as from the filter when in use. In the old days we called this planned obsolescence