I've had this amp for a week now and I have to say that for the money, its an amazing buy!
After looking around for ages to find a decent amp so I could use my 4ft Wharfedale speakers and my Sony sub, I finally found this one. I was a little skeptical that an amp this cheap would be man enough for the job but I can tell you, this thing puts out some power!
I'm not into singing so I haven't used the 3 mic ports yet but I have this thing hooked up right now and its putting out enough power at volume mark 20 to shake the desk I'm working on!
The only letdown that I have found is that the buttons seem a little flimsy in places like the balance buttons. They are kinda small and they don't feel so solid but as you get a remote with it, who needs to play with the buttons on the front! :D
The mute function works great, cuts out 100% of the sound with no bleeding. All in all, an amazing amp for the money!