ThinSkin writes "Just when you thought laser and optical mice were enjoying their reign on mousepads worldwide, Microsoft has to come along and introduces their 'BlueTrack Technology,' a mouse tracking system that aims to work on virtually any terrain short of mirrored and reflective surfaces. ExtremeTech reviews the Explorer Mouse and Explorer Mini Mouse, both of which are powered by Microsoft's newest sensor, to see just how well this technology works. Testing on granite, carpet, marble, and other surfaces, the reviewers were impressed with the responsiveness of BlueTrack, but they also noted that laser mice were competitive on these surfaces as well. Even though the mice didn't get a recommendation from the reviewers (price being a major concern), they did admit that this BlueTrack is the best tracking system available today. MaximumPC has some pictures and a brief technical interview."