The +: even if the play of light is known to all, one never tires of seeing.
The -: The size of the play of light because of stormbeam Contest has the same effect, even more beautiful because there is a color wheel so we never the same color. There are not many choices in colors, there are four that unfortunately.
I did not try other models before buying.
I think the price is too expensive with respect to his "brother" (stormbeam). His brother has a nice effect over the latter. If the play of light is 100 €, the Stormbeam should be € 140.
I do not have that choice would do, I would buy more of a mushroom or a storbeam.