I bought this after hearing an endless string of great reviews. It is a pen format, which makes it really easy to use. Uncap the lid and you see a small flexible felt tip style nib, which makes drawing a precise line easy.
I prefer to use the tip and the flat edge of the nib towards the tip for the most precision. You do have to be a bit careful as the nib widens quite a bit towards the base and will produce quite a thick line. You could use this part to make a wing quickly but I usually just line the top lashes without a wing.
Now for why I gave it a 2/5 stars: it dries up really quickly. Far too quickly. I probably only had two months max use out of this, and I didn't use it everyday. Towards the end it became very greyish also, not like the nice dark black it was at the beginning. Not sure if I got a dud or not but I'll stick with pot format liquid liners and gel eyeliners for now.
At this stage this liner is the best I have ever tried. I brought this pen quite some time ago and it's still going strong. When I purchased this I also got the maybelline gel liner (there was a 20% off or something at Countdown) while the gel liner is a fav as well it's since dried out but not this pen!
This pen has the finest tip I have come across in a liner pen. It took some getting use to but it's great as you can really get it into your lash line while making it look like you have no liner on as you can create such a fine line.
It's pigmented and dries quickly, doesn't flake and lasts on my oily lids all day without smudging.
I love creating winged liner with this pen as you can get the lines and tip of the wing so perfect.
Best of all it's affordable!
If you are new to liquid liners I think this product is a great one to try. It's outdone many I have tried including MAC, Stila and Bourjois.