BB creams are basically used in the medical profession to help with healing skin after someone has suffered a trauma - this can be a burn, laser skin surgery or an operation.
BB creams are applied to the area and they help to heal the skin and reduce redness, on top of this they also work as a 24 hour moisturiser, a sun block, primer AND a foundation!
I was however surprised by it having a slightly better coverage than a tinted moisturiser. I applied it as a moisturiser all over my face and immediately saw an improvement. I did feel the need to apply my usual foundation and concealer on top, but overall my skin looks a lot better today than it has for quite a long time.
When I take my make up off at the end of the day I am still hoping to see an improvement to my skin as this is what the BB cream, over time is meant to help out with.
For now, I think the BB creams are fantastic whether you use them on their own or chooses to apply foundation on top it really doesn't matter as long as they have the healing properties they say they do, I think I might be a little but addicted!