I have used some of the P3 paints recently.
They're pretty good if you remember that a little of it goes a long way. As in "Wet your brush, touch the tip of the brush to the paint, and then paint.".
They can stand a good deal of dilution as well before becoming transparent, making thinning less of a headache. You'll need to keep your brush wet though, because the paint's consistancy is slightly thick.