This is an interesting product. Definitely a challenge worth taking up.
First, the quality is absolutely fine. It sits well on a thin layer of foundation, BB cream, primer or even my cheat-day dermatological cream with some loose powder thrown on. They. Stay. Long.
Second, the colors are VERY VERY FAST, y'all! Just the lightest of dips of your brush is going to give you sufficient color for daywear. They colors show here seem darker but what I got was lighter. I myself am a golden wheat and on good days I tan to a toasty shimmer, which goes well with warmer colors on this palette, but the lighter skins can use the light pink easily too.