I bought one of these from constella for a bargain price of 65 quid delivered.
for that money it's absolutely spot on! i've seen them around various stores on the high street and online for between 150 and 190.
what a great effect, even came with a bulb, but i had to add the plug myself, shock horror!!
anyway, it has a couple of swithches on the back to disengage sound to light or change the motion. great beams of light reflecting around the room from the prism offering great coverage. the response to music is excellent and it moves around at a fair old rate. i can't wait to use this at the weekend I can't see it not going down an absolute storm. it seems to be built like a tanks toolchest which is always nice to see aswell.
at the current price direct from constella it must surely be worth anyones consideration.

I've had one of these for about 18 months now: No problems with it, and a very good room filler..Sometimes I aim it at the ceiling & it provides a nice effect, similar to a mirror ball. I have other Constella lights, and they have all been reliable, and are top value for money when put against Abstract stuff.