Unbelievably thin (anyone else tried Cosmic? Takes me 3 coats and still patchy.) Chips and flakes really quickly, even with a top coat. Irritating brushes that are too thin and too long.
I do like the conditioning undercoat. And I have no complaints about Frisson (although it's probably only because it is so sheer and pale that the chips and streaks don't really show).
But, all in all, it really is a load of overpriced crap. Why has it taken me 5 bottles of the sodding stuff to realise this? I must have been deluded.