The mouse is probably 3-4 years old. During this time, she survived a lot of blows. With every annoying glitch, she hit the table with a bang and because of this the scroll wheel broke, I already glue it several times, but it lives until the next blow: and I'm not crazy, as you already thought, I just often use Oper, which for some reason starts to work just as "good" as the EX. It doubles its price. Although it begins to crumble, I think not a single mouse for 800 could withstand so much bullying.