Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Orginal MX518 was 5 Star V2 is 1 Star.

I have owned this V2 MX518 Mouse for less than one year and the feet on bottom are very worn and the internal connection is also lose (the mouse basically randomly shorts out and loses connection)l; the V2 mouse feels much cheaper in hand with way more case flex than the V1. I could easily replace the feet for 10$ or so...but with the vast improvments in sensor tech in the last year I will have a very hard time picking up anything to augment this POS mouse...RIP MX518...estimated hours of use 2,000 vs 20,000 on the original V1 MX518...