Hi, I don't use nail art pens anymore as couldnt find any decent ones. but I use the orly stripers. I love them! They have loads of colours and dry quickly. As they don't have a dotting tip like the pens I just use a dotting tool instead.
I have tried the wah nail pens and they were ok. But obviously they can be bought from boots, superdrug etc by the public so I decided against them. Hope that helps xx