After my disappointment with the previous model (mouse wheel breaks, rausfallen weights) was this mouse a release. Finally a wheel that does not tilts left or right at the middle button click. Solid and even scrolling, high precision. The software is useful, but has weaknesses.
Deducting's because the software either work correctly only in admin mode, or you have to change the write permissions in the application directory manually, otherwise no profiles can be saved. This dates back to Windows 98-hours and should actually not be so nowadays.