I got to give my Barry M nail art pen a go too. I'm really impressed with how easy it is to use, it's literally just like a felt tip. I expected it to sort-of dot on drips of nail polish but it's not like that at all. I've only tried dots so far but I'm looking forward to giving some other designs a whirl soon.
So I painted my nails a nude colour 'You're A Peach' by Nails inc which I got free with In Style earlier this year, I love this colour so much! and I painted the tips in navy (Motcomb Street by Nails Inc) and dotted on the white with the nail pen. Very simple and I think it adds a bit of a 50's flare to what would be a classic look.
Have you tried out the Nail art pens? What did you think?