The scroll will will randomly scroll back up or down when you are using the mouse. It is extremely annoying. There are a few help pages that show how to possibly fix it but you have to install some software (not hosted on logitech) which I'm not going to do.
I returned the mouse and got a replacement. The replacement has the same issue. I tried it on two other systems both showing the same behavior.
I cannot recommend this mouse under any circumstance