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I purchased this to complement my laptop and its lack of a number pad.
The pad itself is very easily connected with plug and play so no need for software install. The wireless USB dongle slots on the back of the device for easy access and to prevent loss. It comes complete with a case which is good to protect it from scratches etc...
I have been utterly impressed by its ease of use and the several shortcut buttons along the top (internet, Excel and calculator). The sides are 'rubberised' for easy 'gripage' and so can be used in a presentation when standing up plus for when you lean back on your chair to punch in some numbers.
The only real grumble is for some reason Logitech have decided in their wisdom to have the batteries facing the same way so as to cause confusion and several attempts at replacing the batteries. Not really that much of a big deal though and the usability of the device far out ways this slight drawback
Overall then a perfectly formed sturdy pad to add extension to your laptop keyboard without carrying around a full size one.