Great mouse! Have only owned gaming mice at 100g + and switching to this at 68g was an incredible difference. The low weight is probably what I love most about the mouse. The shape is very good but still a little too big for my hands. Probably best suited for people with long hands. Very suitable for palm or claw grip, but would never recommend it for fingertip grip.
The actual build quality of the mouse feels unusually good for being built the way it is. Have owned mice from much larger companies that were of clearly lower quality. Can also not hear any rattle when I shake it. My only problem with the quality is that you can feel a slight crack if you press against the sides. However, the quality can probably vary greatly from mouse to mouse. Something I was not as impressed with are the buttons on the mouse. The right button feels heavy, the scroll wheel can be moved to the left and the rear side button has a very rough pre-travel. But beyond that, the buttons are fully approved. The LED lighting is very strong and nice, but at certain angles light can shine through the holes.
On the whole, I am very capable with the mouse. If the buttons were better and the mouse was a little smaller, it would have been perfect for me. If you have bigger hands, like ergo mice and low weight, this can very possibly be the best mouse you can choose.