Pretty, strong, but known your intended use.
I bought the 6 pro to be used as a meat grinder and I wanted the stronger motor to ensure I wouldn't be over taxing the machine.
Well for that function it works great, I haven't had any overheatin, weird smells, clicks, etc...
However when it comes to mixing as others have stated it is not meant for a small amount (ie: beating only 3 xl eggs, only a single cup of heavy whipping cream). It will do it but it is easier and faster to use a hand mixer or even my old *** sunbeam mixer.
I do not think this motor is incredibly loud, it does make noise but it seems like normal mixxing noise to me, (for what its worth) on high you would have to speak up to have a conversation near it though.
As others have stated as well the beater that comes with the machine does not reach the bottom, and the machine has limits to the amount you can adjust it, mine fails the dime test KA provides. Get a edge blade to correct.
It's incredibly pretty to have on your counter top, but might be overkill for most.