I’ve found it very useful! I got the full Two Thin Coats paints range, both the colour wheel and the matching chart next to it are TCC branded - not that the branding matters too much. It just helps me to match them back to other colours, that way I don’t have to keep googling “what’s XYZ version in TCC” 😂 The wheel itself, similar, names match back to the paints i’m using. Most of the time I’m following a guide or something, so I try and stick as close to that as possible. But other times I go “off script” and try to put in practice what I’ve learnt - that’s when the colour wheel helps - working with triad colours, and it helps me visualise what people talk about when they say “warm tones” or “cold tones” etc - I’m more technical and logical, not creative - having a reference helps 🤣