I bought a pair of these to enhance the pretty basic lighting setup for my band, so that we would have some constant light... previously we were relying on some LED effects which were sound activated, but could end up in a situation where we had no light at all...!
As a small covers band we don't have a lighting guy, so need something that is automated. I initially used these in the configuration where they react to sound and change colour accordingly. This was OK, but one of the pair that I bought is very sensitive, changing at the slightest noise, which wasn't a great effect, though not enough for me to really complain about. I now use these in their colour phasing mode, where they change through the range of RGB colours gradually, quite a nice effect. It's worth noting you can set them to a specific RGB colour if required, or even control via DMX using the built-in XLR socket. All in all, pretty decent value for money