Best Mouse I've Ever Used
Out of all the mice I've used, including regular mice, a crappy vertical mouse which had the scroll wheel stop functioning (Lugulake, don't buy!), and the Logitech Marble mouse (not very ergonomic), this is the best one I've come across so far. The shape of the mouse allows your hand to rest much more comfortably than almost every other mice. To get an idea of what I'm talking about, search up "Handshoe mouse" and imagine a better version of that where you don't have to move your arms or the mouse.
I move the trackball with the upper halves of my index finger and middle finger, while my ring and pinky finger rest perfectly on the back and forward buttons, which are to the right of the trackball (looking at the mouse with the logo facing upwards [not upside down]). The scrolling wheel is in the perfect position; the thumb, stronger than the index, is much more suitable than the index finger to use the scrolling wheel due to how much use it gets. The use of any other finger for the scroll pales in comparison to the thumb now that I see it in hindsight. I'm glad I got this mouse (which commands the highest price out of all the ergonomic mice I've seen of 600$+ new on Amazon) instead of the other well known ergo mice like the Logitech Trackman FX, which lacks a scroll wheel, and the Logitech Trackman Cordless, which doesn't seem to have as ergonomic a shape and has the scroll wheel in the index position instead of the thumb position.
It also surprised me that even though the mouse is obviously old, it still functions perfectly. Though the left click has somewhat of a weaker click than your typical mouse, it's to be expected of an old mouse and you get used to it and eventually stop noticing. I haven't ever used this mouse with regular bearings, but the scrolling (with cubic zirconia) is very smooth and more than adequate. I think for casual single player games like Skyrim, it would be perfect. Competitive online games probably won't suit this mouse because a trackball is harder to do quick mouse movements with.
I use this mouse with the "Truly Ergonomic Keyboard" and I think I found the perfect combination. The small size of the keyboard allows me to get my mouse closer and not have to stretch my arms as far out.
In summary, you should probably get this mouse ASAP (and probably from this person for the cubic zirconia bearings and refurbishment) before the price gets even crazier. Hopefully manufacturers get smart and start making more of these.
Verified purchase: YesCondition: Pre-owned