I have Queen For A Day and it's okay, it does add volume but I find it slightly sticky, it sometimes makes the areas of my hair where I've used it a bit lank looking too. Which is not what I want!
I more recently bought tha Catwalk Root Boost and I love it, it's perfect! Does exactly what it claims to do and makes my hair feel nice too. Can be used just on the root areas for lift or throughout the hair for texture. Gives my locks a nice tousled look when I ruffle it all over. I don't have curly hair, more wavy but the product emphasises that which I like.
As for Superstar, never tried anything from that line so I couldn't comment. I'm a big TiGi fan though, their products are certainly worth the cost. Another similar product you might like to research also is Small Talk, it's a volumiser really but it works great to add height, especially if you run it just through the crown area.