Mouse performance is excellent. I had been using this product for one years. And I am really impressed.A brilliant investment I should say.USB Optical Mouse provided by Dell is ergonomically designed and fits very well in hand, its buttons work smoothly and scrolls very well. I haven’t noticed any problem whatsoever in this optical mouse, its far better then local cheap alternatives from Chinese market. I edit videos on my laptop and I use this mouse. Works perfectly on most of the surfaces. The mouse is nice and big. Chances of your palm hurting after heavy use is virtually non existent.Quick easy to plug and play. Nice response time. A very long connecting wire and hence not very suitable for laptop use. Sturdy body. Very Good at this price.Very good performance. I would totally recommend this produc