I've used a *lot* of different touchup paints, and IMO the Dr Colorchip stuff is OK. Eh, maybe even a little better than OK in come colors, but it wouldn't be my choice for some area that's gonna get corrected from time to time.
I straddle the fence when it comes to recommending the stuff, I could go either way just as I do when choosing something to use on my own vehicles.
If I had a nasty chip in the hood of my car (hey, wait....I do on at least one vehicle!), I'd use conventional bc/cc touchup paint and level it the hard way if I couldn't stand the blob-effect.
That said, I used two bottles worth of Dr Colorchip on the white Crown Vic, and it turned out great, great enough that I believe it helped sell the car. I use it on the Tahoe's DIY (door seam) rust repair and it was perfect for that. But would I use it on the Audis? Nope, not in a million years.
Again, IME you simply *must* use it like a conventional touchup paint or the results will be unsatisfactory. Rubbing a large area with their solvent, even if you use a good MF (which will then be ruined) could easily mar the paint. IIRC they send you a cloth to use...something I wouldn't touch my paint with for any reason.