The Glaive is certainly a high quality mouse with a lot of features, and it delivers on most perfectly. The only downside I see is that it is a bit too heavy at 121 g and that the sensor's performance is capped to a maximum tracking speed of 4 m/s for no obvious reason.
Other than that, the mouse fit into my hand nicely, and the tiny amount of pre-travel was never an issue while testing it in-game. The exchangeable side grips offer a reasonable amount of customization, covering most shapes people could wish for in an ergonomic mouse. Its surface quality is excellent as well for both the smooth and textured variants used.
The software is a bit confusing at first, but once you get the hang of it, you see a lot of possible options to tune your mouse if you are into that.
Its price tag is on the heavier side, reigning in at $69.99, but considering that you get three shapes in one and the built itself, it's still in a reasonable range compared to its competitors. In general, mice tend to be a bit too pricey in my eyes, but with the rest of the market in mind, Corsair is in a fair spot.
I would recommend this mouse to people who don't mind a mouse that weighs a bit more and who don't exceed speeds of 4 m/s. If you fit into that category, I'm sure you will be happy with the Glaive RGB.