Love it, always have a tube on the go. I use it for when I want my make up to really glow but in an unseen sort of way. The best tip I have about it comes from Lisa Eldridge... Dot it about your face and smooth it on, rather than rub it. I'd always done that but then saw her video where she raves about it and she said to think of it like a helix / web that when you gently smooth it on, the parts join together and sort of pulls your face 'up'. The more you move the helix, the more it's likely to 'break'. In order to get the best results, do minimal smoothing and do it very gently.
Watch her video for a better explanation but she's right!