This product really helped the longevity of my lipstick and prevented feathering. It's great for any colour lipstick as it is pretty much clear and isn't drying at all.
My only issue is that its a little bit flimsy as a retractable lip liner, mine broke when I accidentally dropped even when it was closed.
I bought this lipliner a few months ago after reading about it here. I didn't even realise clear liners were a thing until then, but it's just what I need to "match" with all those awkward colours. I've been wearing it a lot with my bluish purple lipsticks which seem to be impossible to match with a coloured liner.
I like that this is a wind up formula as I always seem to be breaking or losing my pencil sharpeners. The packaging is great with this pencil. It's a bit on the long side for my makeup bag, but I can live with that because I really like everything else about it. The lid clicks on securely and stays on, and there's a little rubber grip built in under the lid for easy application. The end of the tube pops off and there's a little sharpener in there too if you like a finer point.
It's a reasonably creamy consistency without being too greasy, so it draws on nicely without any sticking or dragging. The only downside is that you can't see it to know if you've drawn a precise line or not!
I really like this product though and I'll happily buy it again. It's reasonably priced, has really practical packaging and I can wear it with anything. Win-win.