The person who couldn't get enough volume out of this either needs to check his set up or find out what is wrong...I have (2) yamaha SIIV-15 speakers and (2) 10" monitors hooked to mine and I can sound almost anywhere. Sounding for 500 people is no problem at all.
In fact I am thinking about expanding and adding an additional (2) 12" speakers to the set up for outdoor use.
The faders on my unit are very smooth. The controls for the effects can be a little confusing, be sure to go slow in learning how to use it or you can over do the effects and get a muddy sound. When set up propperly it has great clearity, good volume, and lots of versatility. Hmmm... mine didn't come with a cover. I did get the gig bag made by samson and am very pleased with it.
Final annalysis...I'm glad I bought it, if I had it to do over again....I would without reservation.

Solid and heavy, could use better quality volume slides, good layout of controls, comes with rack mounts brackets, fan could be a little quieter, should come with detachable cover for travel, excellent value.
Used it with two Yamaha Club IV 12" mains and two 10" monitors in a 30 x 80 meeting room, power was adequate...could use another 25-50 watts per channel capacity. Good product..would buy again.

Lots of features...lots of power, the person that thought this needed more power for a 30x80 room needs to look at how he has it set up...this thing has LOTS of power. I use with 2 yam. s115iv speakers and 2 10" monitors. Maybe its just me, but aux1 and aux2 controls along with digital effects seem a little confusing. Available gig bag is a must if you plan to transport it any at all. After buying this unit and using it, if I had it to do over...I still would get it and would recomend it to others.

Feature:
I'm very impressed with the effects selections.

Quality:
I have also noticed some quirky spots on some of my sliders as well that have been there since I purchased it.

Sound:
For the money, this unit can't be beat.

Feature:
Enough i/o to make it very easy to use in a small theater space. Also, the space where this unit lives is NOT climate controlled, and yet it is still working just as well as the day it was bought three years ago!