there are very few "bad" paints, I dont think its a waste of money. If you have paints already and you like them, its only curiosity and word of mouth that makes you want more. Im at the stage where I have a mixture of citerdel, vallejo and P3 all are good for a certain purpose. P3 I find better for 2 brush blending, Vallejo can do most things well, Cit base tones, and dont like to be watered down as much as vallejo. Until I run out of a few colours Im holding my $ till I need some. . . . excpt for the $10 new paint range you can find on the forum as a tester.
All in all I doubt they are a waste and are just as good or better for somethings.