I tried them out ...
I really liked how smooth they went on and how well they covered
QFT.
They have discontinued my most used shades for my space wolves army. I have spent 20 hours painting each individual model and so far am half way done.
you have a millions(ok only 7 or 8
) of options:
1. use Coat'd'Arms (names are different, the original citadel paints were made by them)
2. Use VGC (lately the quality of these has dropped a lot(change is between 2005 and 2011), so I'd rather stick with GW paints nowdays than with the game-colors)
3. stock up a lot of needed paints before saturday
4. ebay the needed paints
5. buy the discontinued paints from other, non-gw, stores, they'll probably have a discount on them to free up shelf space
6. shadow-grey = fang , swgrey = fenrisian grey , try them first in the store to be sure.
7. difference in shade doesn't really matter, it's differs a bit from batch to batch independent from producer, so even if there wasn't this change nothing would guarantee that the shades are ok.
(8. I have no idea how much paint you use for a figure, but I know that a 17ml vallejo was enough for about 6000pt of SM including some vehicles. so if you have 1-2 pots of the needed colors now it should be more than enough paint the army to full)
and yes, except for some choices(I see no point in the "dry" and "glaze" line) I was pretty impressed how good the new paints behaved.