Nick
This review is for the returning M510 users out there. If youve owned this mouse, you should know that that Logitech has changed the design a little bit. Along with their new logo, the new "2nd Edition" M510 (missed opportunity by not calling it M510S or something) now also sports a "laser-grade" optical sensor, as opposed to the old "actual laser" sensor. After doing a deep dive for some information, the internet scholars on a couple first-page forums have confirmed a few facts for me. First, the optical sensor is not necessarily a downgrade. Laser sensors have inherent issues - some complaints on the old 510 were that it exhibited cursor stutters, jitters, and shakes - and the modified design is likely to address those concerns. That being said, laser sensors have higher a DPI resolution, which should mean that they are more precise. Conventional wisdom might make you hesitant to purchase this new M510S (my nickname for it). Why would the newer model have LESS DPIs? What an outrage! Well, lets be true millennials and talk about how it feels. The optical sensor feels smooth and rounded, yet agile and lively. Its actually really enjoyable. The cursor "acceleration" on the older version became more pronounced while using them side by side, and it started to get annoying after I actually noticed it. Without subtle wiggles, the overall experience is more precise. Fortunately, the folks at Logitech seem to be pragmatists and have figured that, while they took away some of the super-awesome DPIs, the mouse actually performs more satisfactorily during real-world use. After doing way more research that I bargained for, I found out that most people would agree too. I wish the change was more clearly communicated, though. I almost didnt even open the packaging because I thought it was counterfeit, so my first time using it was littered with skepticism. I wrote this review because I dont think Ill be the last person to go through that. If you currently own or have owned the 1st version M510 and want to replace it or get a second one but are now reluctant because its a different design, just buy it. Thats the beauty about this thing: a mouse is not something worth obsessing over, and it just works well.