One thing to keep in mind is that this not a very big skimmer, and just like all other cones the reaction chamber is as well small. Having said that, it does seem to work very well. I would compare the skimmer in size to the ATB 840 / Small, with just as good performance for a heck of a lot less money. I have it running next to an Alpha 170 now, and it's doing a pretty good job for it's size. It's pulling less than the 170, but it's also a lot smaller than the 170 too.
I'll get it running in the office today and report back on noise level. So far I can say that 8.5" is probably too deep to run this skimmer from what I am finding, or it is going to the maximum depth to run it at. I have to run the gate valve wide open at 8.5". I will try it in my office around 7.5" - 8".
Jeremy