I bought this mouse as a replacement for a Microsoft "SteelSeries" Professional Gaming Mouse.
The overall shape is very similar to the Microsoft mouse. However, the build (plastic thickness) of the Monoprice Blackbird Gaming mouse is not as sturdy as Microsoft. Also, the buttons are quite flimsy in comparison. I will have to wait to see how long they last.
Finally, my main problem is a mouse with this kind of questionable duration is way overpriced. The Microsoft SteelSeries Gaming mouse cost $25 and lasted 10 years. Unless you buy the Monoprice Blackbird Gaming mouse on sale ($32.00) regular price $49.99, I would say pass on buying this mouse.
4 Stars for the price and build quality. ( I would actually give it 3.5 stars).