I am using two 110W on a 330 L reeftank and the quality and the power of the light is very good. The spectrum is a bit purple when compared to the T5 tubes (204W in total) that I used before.
Another advantage: The temperature of the reeftank has gone down by approximately 2 degrees after installing the Maxspect.
After receiving the new silent fans, which Fish-Street kindly sent me, I am impressed by the low noise levels: The Maxspect LED is as silent as a PC now.
I can recommend this LED light!

Excellent delivery - 6 days to UK - but unit faulty on arrival with broken wire solder joint in PSU, probably due to transit vibration. Easiliy fixed and now very impressed with performance of the 160W unit I bought.
Much much brighter than the 150W T5s it replaced.
Also has the new quiet fans and its barely audible at all.
I need 2 in total for my 750L reef, but didn't want to shell out all the money until i had tried one out - I'm so impressed with the performance that I have now ordered a second unit.
Cheers
Mark

This lightning is perfect for my 140 L cube aquarium. It's bringing out the colour of my inhabitants and have that natural shimmer that at HQI gives.

I truly recommend this!

The only negative part is that it is to noisy for me but with a change of the fans it probably going to be fixed to a better level.