This style of lipstick isn't anything new - I used to wear Max Factor Lipfinity religiously as a teenager which was the same sort of premise and I remember a couple of other brands had similar products. I spotted the Rimmel Provocalips in Boots* and thought I'd give it a try as I really liked the colour...who knows, maybe I just wanted to relive my youth!
Basically, one end adds colour - which is quite a flat, matte colour that could be quite drying - which you let dry and the other end adds gloss and moisture so your lips aren't looking crusty.
It lasts really well, even through eating/drinking but if you're eating anything oily it will remove it (an oily make up remover is best for taking it off at the end of the day) and make it feather. You need to top up the gloss through the day. It doesn't transfer at all but tends to wear away on the inside part of your lips first.
They have a really sickly sweet synthetic fragrance to them which I don't really mind at all but I don't know if it would be for everyone.
Does it last 16 hours? Um, well there probably would be something left on your lips after 16 hours (probably looking like dodgy lipliner) but it's more like 8 hours, I can go a full day at work without having to reapply the colour.
I would definitely buy this again, and I plan to try out some more colours (maybe a nice red or plum colour), as it's great for a day at work where you're busy and don't have time to top your lipstick up every hour or for a night out when you don't want to be glued to a mirror all night. At £6.99 it's pretty purse friendly too.
I bought mine from Boots* for £6.99 but you can probably pick this up wherever sells Rimmel.