I use it and I love it. I swear I don't work for them, but I am not exaggerating when I say it has totally transformed my skin.
I have rosacea and have to be really careful what I put on my skin, which means that if I want to treat my rosacea I have to sort of neglect the rest of my skin. But with the ordinary I can do both.
I use Niacinamide and Zinc, then Alpha Arbutin in the mornings. I used to also use Azelaic Acid, but think it's actually unnecessary, so I've stopped. The N&Z has improved the texture of my skin and it breaks down keratin I think, which reduces chance of acne (rosacea is a type of acne). The Alpha Arbutin lightens / brightens my skin so reduces the redness. I believe it does do this as I have noticed an improvement.
In the evenings, I use 'buffet' and then retinoid emulsion, followed by moisturiser.
My rosace triggers are hormones, oily or highly perfumed skin products, red wine and emotional stress. These things will always trigger my rosacea and some are unavoidable, (hormones and stress), but I have found that since using the ordinary, I can get it under control a lot more quickly. Maybe it's a placebo effect with the rosacea as stress is one of my 'triggers', but I really cant argue with the texture and condition of my skin overall, even forgetting about the rosacea. If they ever go bust I'll be gutted!