i'm really annoyed at myself for losing this buffer. it's been a saving grace even after going through the wash and being chewed by cat and dog alike. it's just brilliant and if it's not in your nail care arsenal, it really should be!
to be fair i never really liked the emery board side of this buffer, it just seemed redundant to me and never fully filed my nails how i truly liked them, so i wasn't sad when that part got destroyed.
the rest though, is perfect. it's designed in a way you can hold the file and simply rotate it in your hands to get to the next step. sure, it's a lot of work, but it lasts for ages and there's something deeply satisfying about having freshly buffed nails.
i don't recommend over doing your nails, as the friction from the board rubbing makes it feel like you're a NASCAR driver and you're burning rubber. it's not pleasant and is very ouchy. gently is definitely the way to go.
the only negative is that you can instantly tell when this has been used, even once, as the firm but soft rectangle becomes squishier and harder to use. the edges peel up in places and it becomes quite unattractive. but, when i can find this buffer again i'll gladly repurchase it, and it will have pride of place in my nail kit. love it.