I would love to try out the Mission model paints when I get my new airbrush but looking at the price of each bottle here in the UK average price is about £5.50 a bottle,so if your painting a tri-colour camouflage that's £16 on paints,£8 on Polyurethane mix additive,£10 on Thinner/Reducer,£7.50 on Flat clear coat,£7.50 on gloss clear coat and £7 on Grey primer.

That's £56 and the price of a kit and not including metallics or any other colour needed.

Wow

But the bottles are bigger Of course, it makes an expensive start, if you need ever color in the book. It does make sense to buy "major" colors, for example for your camo, then all "auxiliaries" like color for tools, tracks etc in smaller bottles, like Vallejo. Imho MM paints are realy nice as water based acrylics, much easier to work with than most other brands, especially for freehand camo.
At the beginning, you can also save by using "other" thinner, window washing fluid (the one with alcohol) works just great, although i only use it for coverage, paint sprays well enough for small parts out of the bottle (even with 0,2mm nozzle). Poly aditive is a good thing, i would not skip it. As well, it works on Vallejo, Mig and AK paint too.
So get those 3 colors, and add others as you keep building kits. This does work well if you are consistent with your builds tho (Like next model cant be same era, nationality, or even category)

Yeah, I had some sticker shock when I bought my first batch, but as Darius says the bottles are bigger, and they do spray beautifully, I am very happy with them so far. Worth it IMHO.

I found that thinning them, with filtered water works than using all of the brand additives.

Howdy Y'all
What does the poly additive do?
Thank you,
Don "Lakota"

From the company website:

Add one or two drops of MMP Polyurethane Intermix for additional reduced tip dry when spraying straight from the bottle. MMP Poly increases flow , lowers drying times , added leveling , increased blending when brush painting, durability and adds a slight eggshell finish. As modelers we highly recommend this as an option.

Because I have seen so many good reviews and as most say the bottle are big I will order a few bottles and see what there like.

Honestly mate, they are fantastic paints. Bigger bottles and remember each bottle will probably do 3 or 4 models. The paints spray beautifully, and unlike my usual paint combo of Tamiya paints and Mr Hobby levelling thinner.....these don't smell. Go on.....treat yourself!