I like very much the way you can dosage it. It is safe, economical and convenient. But it is a bit more difficult to use if you donot have cotton pads.
I have the classic one and it stinks a lot like acetone.
It takes the nail polishes off easily but it dries the cuticules quite bad.
I like that I will be able to refill the bottle. I read on most reviews that it stopped working properly but I did not have any problem with it.