I have an OBSESSION with liquid liners. I MUST have two make up products on my face at all times and those two products are liquid eyeliner and concealer (I even have both these products to work out hAHA!!!) I've tried probably over 25 different liquid liners in my lifetime, but these are the three I'm currently using up.
All three products are brush tip applicators, which I don't mind. I actually haven't decided if I like brush tip or felt tip better. I always lean toward felt tip since it gives a juicier application, which could be quite difficult for beginners to love.
Kat Von D Tattoo liner in Trooper: This has an extremely precise tip (as you can see). It is also the softest and most bendable tip. This allows the application to be extremely comfortable on your eye. This is probably best for beginners, but for me, because I like to do my eyeliner in one stroke, it gets quite squishy and I find that I have to draw my line a bit slower.
The pigmentation of this liner is black, but is not black compared to other liners I have tried. It also was the easiest to bleed and come off out of the three liners. 2-4 rubs, and the product will fade.
The application is extremely smooth and the pigmentation is very black. It is not waterproof, but will remain on my eyes all day. Three to five rubs will make the color fade.
The actual brush is shorter than most, allowing for an extremely precise line, but is extremely hard and stiff. I have a very difficult time making my eye feel comfortable when applying if I wanted to make a very thin line. I usually just use it on its side and get a line of medium thickness.