This mouse is pretty decent for casual MMO gaming and with the 12 side buttons it's definitely much easier to execute skills with your thumb alone.
In comparison to Razer's Naga Trinity the side buttons needs a bit of force to click and that means less activation of unintended skills during an intense gaming session. I've also tried this with some FPS and Action shooter looter games and it does work if you have a number of utilities/abilities needed to be bound to different keys, however keep in mind that there is a DPI Deviation if you're using a different brand or type of mouse so you need to adjust a little bit of your DPI until it feels just right.
Mouse Switches are very tactile and clicky in comparison to some of the previous versions of Naga mouse series and it comes with better mouse feet. It's also lightweight and easier to move around when it comes to Camera tracking.

There are some small complaints I have for this mouse such as the Razer Logo not having any LED and the mouse being too loud specially with the scroll wheel.
I've also notice that with it being lightweight the inside of the mouse seems very hollow in the back side and it feels like they removed a lot of components than what the trinity mouse had.
For a $100 mouse the build quality on this one seems lackluster.

Overall I think it's a decent mouse for MMO gaming I do recommend picking one of these up during a sale if it's available,
I don't see this being a $100 mouse for it's build quality.