I purchased this on a cosmetics sale so it was definitely cheaper than the rrp of $30. I wanted to try this because I am really impatient with nail polish drying. I've tried other fast drying top coats but not a drop.
The consistency of this is like an oil which is thin and runny. I love the dropper so you don't even have to touch your nails compared to a fast drying top coat. It won't ruin your nails at all and it works well.
I can't paint my nails without using this anymore as it really dries nail polish quickly. However, still be cautious as you can still ruin your nails if you scrape it on something. It's dry enough that you can touch it without leaving your fingerprint but it's best to keep your nails safe for at least 20-30mins.
I was a bit unsure whether or not this one would work, but I decided to give it a go. And what do you know - it does work! A couple of drops on each nail after the top coat and my nails were dry within 5 or so minutes.
Now, there are people out there that thinks that the nails will be so dry that you can rub them against things and it'll leave no marks. This is not the case. You should still be very careful for the next 20 or so minutes in case you bump into something. But I could gently stroke my finger over the nail after 5 minutes without leaving any marks whatsoever. Very happy with my purchase!