Clearly I have been kept out of the loop on this for some time. After seeing a lot of posts about this a few months back I decided to pick some up, but I've only just started using it. While it's not a wonder product, it does work and prolongs lipstick wear drastically, however not completely untouchup-proof. I when I last went out with a red lip and I did not reapply all night (probably should have, but I was a little worse for wear...That's what the end of exams will do to you!). It made my lipstick wear evenly too meaning it did not end up patchy.
To use, just apply your lipstick in the normal way, blot and apply a thin layer of this over the top. Smells and tastes a little odd, a bit like that stuff that stops you biting your nails... But if it works! I've been wearing a lot more lipstick too recently because of this. Usually I apply it and it's gone before i'm out of the door, but being able to add a bit of longevity has mad me a bit more lip-venturous, roll on summer and neon brights!
You can purchase Lipcote from Boots for £3.35.