I use Tamiya paints and they are great. But a few days ago I ordered 3 Lifecolor paints (Dunkelgelb, olivgrün and rotbraun for the StuG III and the Panther I'm building right now) after reading in several websites and magazines about the awesomeness of the Lifecolor paints.
What I can say after airspraying my Panther with the Dunkelgelb is that the shade and finish are great.
Problem: airbrush had clogging problems and to finish I had to clean the needle of my airbrush 2 or 3 times. Not a disaster but given that you MUST spray several very light coats, waiting some time between coats,the clogging may become slightly annoying. On the other hand some retarder could fix the problem. I will order it and try again. If I'll have good results, I'll definately use LC again (but I have to be honest here: Tamiya are much easier to airspray).
Ah, forgot to say the in my test I thinned the LC with Ultimate Universal Thinner (ratio thinner/paint:30/70, as per instructions)