I have this in the colour Dark Cherry. I've tried other pinks and reds in this line, but Dark Cherry is the only colour that looks really natural against my fair-medium skin. (All of the reds look the same as each other on the cheeks, and same for the pinks, but the real difference between shades can be seen on the lips.)
I love it. I use it as a base under sheerer lipsticks. When I was on holiday and in a pinch, I would literally just dab some on my lips, swipe with my finger, use the excess left on finger on my cheeks, apply some more on cheeks if needed, and go.
That brings me on to application method - a lot of people say this looks blotchy or patchy, but swiping this product on your lips as if it were a liquid lipstick will definitely mean uneven application. This product is watery - you have to work with it. Rather than swiping, just dab a few dots on your bottom lip, rub that in, and then use whatever is left on your fingers for your top lip and/or cheeks (some people may not like the idea of getting their fingers messy - a cotton bud could be used instead, or whichever tool you find easier. I don't think I'd use a lip brush, though.) I emphasise applying in steps because this product seems to dry quickly, especially on the cheeks.
Definitely recommend - you may need to try a few shades before you find the perfect one, so go to the store to check these out. I'm MAC NC25-30 for reference.