Size of Mice & Handling:
I have average-sized men's hands and it is really perfect in the hand. By exchangeable fingers shelves it leaves no wish unfulfilled.
Workmanship / materials:
Everything seemed very high, the rubber does not stink, the ceramic feet speak for themselves and cause a very smooth and stable gliding. However, since ceramic is a very resistant material, be sure to work only with mousepad, as it quickly so that scratch surfaces.
I own currently no Mousepad, so I took an old, slightly crumpled A4 block as underlay and really expected nothing of it. After I calibrated the mouse with the "Lift" button on the surface, it runs without hakeln! I'm really surprised with such a positive result I did not expect! I'm even wondering about whether I still want to buy a mouse pad. -D
But not even last a little note: The 5 different colors which can flash the mouse are certainly very smart, but you could find fault, that it is possible / is not necessary, "rumgeleuchte" to operate the mouse without this. Also the power consumption is thus (unnecessarily) increased. Also I'm guessing that if in the mouse something first gives up the ghost, it will be this light, since the rest just makes too solid impression. This, however, only as a note, I do not think I really someone should it be disturbed.
I hope my recession has helped you.