Dimlux 600w Expert series, anyone use one?

Hi All, Ive just purchased one of these but I can find very little information anywhere about them from actual weed growers?

Does anyone here use them? Im really interested to see any grow journals or just general feedback from people who use them.

http://www.growell.co.uk/grow-lights/complete-lighting-systems/dimlux-expert-series-complete-light-systems.html