Everybody note that the pic below is not of the Maybelline Lineworks liner, but of their regular liquid liner. The lineworks liner has a felt tip brush and is pretty easy to hold. It gives a continuous waterproof coverage for about 8 hours. It is still pretty good after that, but I noticed it starts to flake a bit after that, so you'll probably need a touch up.
Pros:waterproof, long lasting, easy to hold Cons:flakes a bit
this is a great waterproof liquid liner with a real liquid brush, not felt tipped. if you are a brush user, you will like this. the brush hairs are not too long so it gives more control, although it is a bit blunt, so it's geared toward a very mod looking line.
it is also TOTALLY waterproof. i love that.
only comes in black
Pros:stays on all day. Cons:no other colors, made for thick lines only