Having initially bought a compact wireless mouse for my laptop, I quickly realised my error because those micro-sized mice are best suited for the small hands of children and not for prolonged use of an adult. I soon found my fingers and hand sore from even moderate amounts of surfing. Also I was frustrated at having to constantly replace batteries.
This proper-sized mouse is exactly what I should of bought in the first place. My hand fits it like a glove and I never need worry about replacing batteries again.
All in all, pain-free pointing perfection delived to your door for a fiver.
Well done Logitech, Well done Play!