I have no complaints on the sound it's putting out. I do have complaints on the unit I got that came with manufacturing defects which is now sitting in a box to get shipped back, and their somewhat slow CS replies. But I'm excited for the replacement, because what I was able to do with this one in a couple days was impressive.
The only person I've seen mention that the LF filter is set to high hadn't heard it and also doesn't like vinyl. Haven't seen that criticism from anyone who's used one yet. Could be out there and might bother someone, but nothing I noticed having a negative effect in my few test runs before I boxed it back up.