External Powerhead, who has em?

[Willow]

does anyone run one of these external powerheads?


http://www.championlighting.com/prod...cat=493&page=1

there a few different companies making these. the benefits seem to be they don't transfer any heat to the water, you only see a tube in the water and for the flow you get a fairly reasonable price. it looks like they get the extra flow kick out of an educator on the end of the output nozzle.

any experiences with these would be great.