I use liquid eyeliner almost everyday and winged liner is my favourite look. This eyeliner pen is easy to use and you do get a precise line. However I was rather dissatisfied with this product. The colour was dull and the eyeliner smudged at the slightest touch. It didn't last even a few hours for me.
I would use this eyeliner for a base line since it is precise but I would go over it with my usual liquid liner.

N.B. This is just my personal experience with this product.