I've been playing with them for a while now. I was looking for a paint line to replace the lacquers I had and this stuff popped on my radar. It's pretty much odourless. It requires, apparently, their own thinner and, if you want a satin, harder finish, their poly additive. Basically, this is Createx stuff with their thinner and poly additives, though you have to be careful which Createx additives you want to substitute (which are cheaper than the MM brand).
This stuff lays down nicely and typically has a very flat finish. As far as model paints go, their white is probably the best for either airbrush or brush and has excellent coverage. Their colours are very accurate and the range is ever- expanding. Hand brushing this stuff is much easier than many other model paint brands.
Mixing thinner and poly has a pretty specific range but very simple to get the right ratios (see their website for details). It looks very thick compared to other paints, but sprays nicely regardless. I've been able to get very thin lines out of a HS .15 nozzle/needle after playing with mixing ratios and air pressure. Poly supposedly helps with tip dry, but it still seems to happen more quickly than with other paints I've used.
Washup is very easy: flush with distilled water and then a final flush or two and wipe with thinner and you're done.
Because of the proprietary nature of the thinner and poly, it tends to react poorly when it comes into contact with other alcohol-based or lacquer-based thinners and will behave poorly out of your airbrush. The poly additive has a very low shelf life and is best kept in the fridge to get it to last for any length of time. Lately, I've been hearing of people having issues with the thinner going off. Curiously, I have found that Future floor wax (or whatever brand it's called outside North America) will act as a substitute for both the thinner and poly, though I don't know what the long-term effects are like. I tend to switch brands of paint depending on the purpose, and you have to have a very clean brush when you switch back to MM. Because of this finicky nature and because I like to use different types of thinners and ratios for different purposes, I've decided to use other brands.
