Pros: Decent functionality (when it works) and customization. Software easy enough to understand.

Cons: A bit large. Side buttons somewhat fiddly to reach with thumb. Worst bit, though: This mouse stopped working within 2 months of purchase, which is a new low for me in terms of products that initially worked fine out of the box. No, I didn't manhandle or mistreat the thing, or spill anything on it, or misuse it in any way. Made in China.