Positive
- Absolutely Plug and Play (Windows 7 Ultimate)
- High-quality workmanship
- Reliable on any surface
- Can be switched off (on / off)
- Efficient energy consumption
- About Logitech's Unifying USB receiver other devices includable
- Good pressure point of the keys with one caveat (see below)
Negative
- Four functions of scrollwheel ("forward / back" button by side, "scroll" spin; "new tab" by simply pushing; "new tab / page at the same time back" by stronger pressures) are exactly in the M525 too much. This always causes frustration moments when too hard you push on the scroll wheel and wrong (incidentally completely meaningless) function triggers.
- No Bargain