I was a chronic nail biter for 20+ years, so my nails are now thick, full of ridges and are very brittle. Normally filing my nails is one of the most horrible things - the emery board tears, giving me paper cuts and rendering it useless; after completing one hand the board/file is essentially dead; the horrible grating sensation and the length of time it takes to file my nails down to a decent length (shortening them with anything else simply ruins them)... I can go on.
But this... This is a dream. So effortless, so smooth. It is positively bliss. You can file from any direction, without worrying about a single thing.
Investing in a product such as this is very much worth the few extra pounds - especially since with the lifetime guarantee (I was dubious, but there it is, in it's lovely aluminium case!) as it is a nail file for life.
I have now bought one for my mum, my potential mother-in-law and I'm going to recommend this product to anyone and everyone.
If you love your nails, then your nails will love this!