My every day foundaton
This is my daily foundation now and I won't be switching any time soon!
I always struggled to find a shade match in commercial foundations - there are more options now for darker skin tones but it's still limited in terms of the range of undertones catered for. Even in RCMA, I can't find a perfect match but I certainly found a range that was close. I just adjusted the shades using the adjuster palette/godets and I now have a range of shades to properly add dimension to my foundation application - two base shades, highlighting, bronzing and contouring all with once foundation in a single palette... I have all the blushes too! They have come out with some shimmer highlighting shades but they're harder to find.
I've never had any issues with applying this foundation but, from reading, I understand a lot of people do. It's understandable - it's oil based, which isn't so common now, and very highly pigmented. Skin prep is really important to ensure it doesn't cling to dry patches. I use Embryolisse mixed with RCMA pre-foundation lotion as a base, only using primer to control oil where needed. I then find it easiest to paint it on using a foundation brush (you can contour and add dimension in a very messy way) and then very firmly press the foundation into the skin with a sponge (press and roll, with a not too damp sponge given this is an oil-based product and water and oil don't mix!). Because it doesn't set until you add powder, you have lots of play time and pressing it in firmly not only gives an excellent finish, but also ensures there's only a thin layer on the skin, which I think is the trick to avoid caking. That technique works great for me. As an oil-based foundation, it's actually improved the condition of my skin too so that's a bonus!
Using it as a high coverage concealer takes a little more work (i.e. you need to set each layer to build opacity) so I personally don't use it for that - I prefer something like Kevyn Aucoin Sensual Skin Enhancer, as it sets more easily and it's also oil-based so they play well together.
All in all, this foundation, when applied well, gives the most natural looking finish of any foundation I've ever used.
If you're coming from a liquid foundation, this is a very different application technique but, once you get the hang of it, it doesn't take any longer. Definitely worth getting a 5-part series to you have lots of shades to work with.