There are things I like about the gestures on a MM. It's just that I think a proper "gaming mouse" with physical buttons is easier to use and it's easier to remember how you have buttons mapped.
When I am using a trackpad or the MM, I use Better Touch Tool to expand my library of programmable gestures. With the extra gestures, I get extra functionality, but it's hard to remember that a swipe with three fingers opens a document, a tap with three fingers saves it, and a press with three fingers closes the window. I have tons of actions like that mapped out. I use my mouse like it's a second keyboard that I can use with one hand. It saves me a lot of time.
The MM can work in that capacity, which is more than you can say about most mouse devices, but it just isn't very practical unless you're super committed to training yourself to use an extended set of gestures that don't make a lot of sense.