I'm trying to find a good topcoat and I love the idea of a pen so that the topcoat doesn't take on the under polish and create a tint towards the end, but this is NOT a good top coat. I have LAQA nail polish and that dried faster than this top coat. The topcoat is still tacky after 30 minutes and after an hour, I can make a thumbprint in it. It's not advertised as fast drying but... this is a little silly.
Additionally, there is no "squeezing" to the top coat (I don't know about the colors) but it's a clicker at the top. Which is actually nicer to me, controls how much is used, but for the small amount that came out (it comes fast, watch out! Hover over the nail when you click it!), the fact it doesn't dry is just impractical for a top coat.