The qc is hit or miss on the ones I've had, and the reviews at eham and elsewhere sum it up similarly. Read the eham reviews on a prospective purchase, not for the stars but say if more than one reviewer speaks about the same issue, that device just might have some design/part issues and now you know about them.
The good points were its features, and by its I mean the 660. Lots of memories, rx's well enough, but the spur issue as well as having to readjust the bfo for each band is tedious and made me get rid of it, and yes while it has lsb and usb options you still end up "calibrating" the bfo wherever you go. If all you wanted was to listen to ambc/swbc with the synch on, it'll do that well enough if the spur is out of the way. Also, the filter curves were more of a outline of the old TR7 car, you remember those right? A wedge. They're close to the target but not close enough, maybe they'll release a model that doesn't have spurs, sawtooth filter passbands, and is accurately calibrated as to reference oscillator. If I could get another cheap I'd use it to dx ambc and swbc but leave the bfo modes alone.