It comes in a little bottle and holds just 10ml of product, which may seem like nothing, but this just doesn't disappear at all (I've been using mine once a day for around three weeks and it still looks full). It contains Salicylic acid, to get rid of the pesky buggers, and claims to be able to reduce the appearance of post-spot marks or any scars you may have too. It contains caffeine and red algae (??!!) which is meant to reduce redness and calm the skin. This is meant for use at night after you've cleansed the face, but can be put underneath make up in the morning too.
I have to say, I agree 100% with any claims this makes! After 2-3 days of use, the spots on my chin had reduced massively to the stage where they could be easily concealed. I also have really noticed the lack of scars they left and how normal my chin looks. I usually get all my spots on my chin, so the scars are usually quite visible, but no more! After applying my foundation this morning I reached for my concealer and realised I didn't have to use it! I know £12-13 may seem a bit expensive to some for a spot treatment, but it does the job so brilliantly and seems to last for so long too, it's definitely worth the money. Should I ever run out, it'll be repurchased immediately. Also, it is drying (to be expected), so as long as you make sure you only apply it to the spots or scars and not huge amounts on other areas, there's no problem. Have you tried this? What did you think of it?