The devil is actually not in the remover, but in the excellent brush, which is fairly stiff, with a pointed tip. It picks up the right amount of the remover, removes whatever excess of the polish there may be and it's easy to wipe off. I'd used a pen corrector, which was fine, but the tip got stained with the polish and needed constant replacement, when I run out of the spare tips the pen became useless even though there was plenty of the product left in the pen. I suppose this product is gonna last for ages, and when it's finished I can fill the bottle up with my remover and this, combined with the brush, will do the same excellent job.
EDIT: The brush, which I loved so much at first, turned out to be total crap. The brustles literally got dissolved by substance in the bottle about half way through the product. Now I'm using a sort of makeshift replacement brush, but this shouldn't have happened, should it?
Disclaimer: I bought the product myself for my personal use and I am not affiliated with any company. I am not paid to do this review and everything I said here is my genuine opinion.