I just bought one of these.
Trade Me Link removed.
Please read the guidelines.
Mod Bill.
I am very impressed with it.
It has been running in a 300L tank for 48 hours and the water has gone from green pea soup to crystal clear in that time.
I did have a cf1200 in the tank and did 50% water changes every 3 days, turned the lights out etc, etc and couldn't get rid of the algae.
Its quiet, easy to prime and replacement UV bulbs are only $18.
I score it highly.