I had some older Logitech mice that I had used up. G903, G502, G703 ETC. I just replaced all of them with the same models. My original ones were at lease 7 years old or more. I got the new ones this weekend. I noticed that there have been "improvements" made to all of these rodents that are unadvertised and unmentioned anywhere. They have better quality cables. They have better quality grips, so not having to use grip tape. They have better quality "feet". They have more uniform and brighter RGB lighting, Most importantly all of the switches especially the mains are of better quality. The scroll wheels with tilt and freewheel have a lot tighter tolerance now. They are more or less completely different products than they were the first time I had purchased them. Of course anything with HERO is 25,600 DPI now as well. If it is too old it will fail on the update. I figure this does not really matter to anyone. It is just for historical purposes.