I purchased an AllTerrain Wired 3-Button Mouse 2-4 years ago from the discount bin at Kroger for about $7. It turned out to be my favorite optical mouse I've ever used. It is still the mouse I use at work. The sheathing on the wire started pulling away from where it connects to the mouse exposing the inner wires, but no other issues. I wanted to get one for home and to have a backup, especially since I'm currently working from home, so I finally broke down and spent about three times as much on one directly from the source. I was delighted to find this exact model still available with no design changes. The only difference is the scroll wheel is significantly stiffer/ clickier, but not too bad. I really love the design with the pass-through hole in the center, which looks cool and makes the mouse easy to grip. Blue is my favorite color (and has always been the brand color for all the companies I have worked for), so I really love that the LED light is blue and the inner lining of the pass-through hole is blue. I would say the $21 or so was a good investment as this mouse is still my daily driver. I like the knurled rubber on the scroll wheel. I think the only suggestion i would have would possibly be add a rubber surface to the click pads so that it would feel less like your finger position could slip (as long as the rubber wouldn't peel up). Thank you for a cool quality product.