Particle Candy looks nice indeed, and above all the demos are very well done. But I tend to agree with Swift here. It's true that getting impressive effects is really a matter of doing some trials until you get the right effect. So that's a bit overpriced IMHO, especially with good free particle systems out there. Just an opinion.
Again, on the feature and ease of use side alone, that looks like a real good library.
Again, on the feature and ease of use side alone, that looks like a real good library.