I've got the entire Scale 75 paint range except for the terrain paints. The Scale 75 paints (both ranges) are really good for their browns (the leather set is my favourite), blues, greens, NMM sets and metallics. The flesh tones I'm not sure about. The pigment doesn't act exactly like the other paints when thinned (like a glaze), it usually ends a bit blotchy so can throw me off when switching between colour palettes. I haven't had a proper test of the reds, so I can't give proper feedback of them yet. The metallic paints seperate really fast, they can completely seperate in hours. I really like their primers, it dries/cures faster than vallejo so I'm not waiting as long and it's also ultra matte like the normal scale 75 paints (not fantasy and games). The inks are very interesting, they can make certain colours really pop.
I still like different brands for different colours, I prefer citadel for yellows and ochres and vallejo for white - grey - black.
