I bought this mouse for using with my laptop at university, being comfortable to a PC mouse rather than my new laptop's alien and fairly irritating touchpad. I have found it to be a great investment, and well worth the money - I paid around £20 for it.
The USB wireless connection means that no wires tangle or trail on the desk, and also makes it exceptionally easy to pack up and travel with. In my experience, the connection has never faltered, and the sensitivity of the mouse is very impressive.
The body of the mouse itself fits perfectly in the hand, and is small enough to use resting on the body of the laptop, below the keyboard. The buttons and wheel are positioned well, work smoothly and have stood the test of time and general abuse - mine is now a year old, and looks and works as it did the first day that I used it.
The only negative aspect I can think of is that my specific model does rely on a battery - however, it is a simple AA battery and lasts a long time before needing replacing. Overall, this is a wonderful product for anyone travelling with a laptop!