A little while back, I attended their launch event and was given a few products to try. Top of my list was their liquid liner.
I've been using this ever since the event and have been seriously impressed. It's jet black and stays that way pretty much all day. There's no cracking or crumbling, even after 14 hours wear.
It costs £16, which although is definitely into the higher end price bracket, I wouldn't hesitate to repurchase.
The only downside to this liner is getting hold of it! DHC aren't available in shops however you can purchase this directly from them via the catalogue or their website.
Have you tried anything from DHC?