At work we have about five Microsoft Wheel Optical Mouse devices. These are ultra cheap wired optical mice the light up red light on the back is stylistically nice.
This mouse doesn’t offer much ergonomically providing slightly less ergonomic comfort than the Microsoft Comfort Optical Mouse 1000. The actual curvature of this mouse is somewhat superior to the comfort model providing for slightly better hand comfort on the top. The sides are slightly less indented then the already meager indentions of the Comfort model.
The reinforcement plastic around the scroll wheel is split (unlike in the comfort model) and this allows the structure to flex when the buttons are pressed producing a very flimsy feel.
As for the bottomside of the mouse it actually slides much better and tracks on multiple surfaces much better than the more expensive Microsoft Comfort mouse. In the actual functioning catagory it seems to be a better product even if it feels more flimsy and has fewer ergonomic indentions.
Overall, this mouse is functionally superior to the Microsoft Comfort mouse. It is less comfortable overall (not by much). It feels more flimsy in its construction but at the price point you could break a few and replace them without sweating it too much. My personal recommendation is to upgrade to a better mouse but as far as cheap mice go this one will do the job.