Instruct: Classify a review into positive or negative sentiment.
Query: great for years then....

i have had this mouse for years and it has worked perfectly until the last few months. it has progressively begun to lag and freeze more and more, to the point that i could not effective navigate around the screen. this problem vanished the instant the mouse's receiver was disconnected and a different mouse was connected. i've seen several other reviews stating similar problems.on the flip side, before i started having problems, this mouse was great, all but 1 of the buttons (the search button) were perfectly placed. i'm torn as to whether to purchase another.