I have a few of these liner/shadows from BE and I quite like them. I'll admit, working with a powder liner can be difficult and it can be more messy, so if you want precision, this is probably not the way to go. But you can get a nice messy look with these, when you don't want that perfect look.

I do like that these, they are versatile and I love BE products in general, however, it won't be everyone's favorite eyeliner.

I also use the shadow as a liner. It works just as well. And, I never use either wet.