What an ingenious little device! I've previously used those silly battery operated trimmers, and have all failed in at least one area - most notably getting 'clogged' (is it a man thing?). However, this thing takes simplicity into its own, and provides a great cut!
It's pulling factor is that its not mechanical, or battery powered - you simply place it up your hairy cave, and twist the bottom of it. Voila! How does it work? Simple - as you twist the bottom, this turns a set of tiny blades at the top, which work against another set of blades fixed to the trimmer. The result - a simple and 'quick' trim! Whats more, you can wash it!
Couldn't be happier! Robustly made (which contrasts most Gillete shaving products, considering their stupid names) and just does the job. What more can I say? No more hairy caves!