Would the above mentioned one be good for through hole soldering?
If you mean the usb microscope I linked to ... yes, works just fine for
inspecting through holes as well. Those kind of microscopes are no use during soldering itself though. Focus point is far too close, so you have the microscope right above the pcb. No room for soldering iron or hot air gun. But it made inspection a breeze. I used to use an optical microscope for that at first, but usb microscope + laptop is far more convenient.
I'd love to get me one of those stereo microscopes a la mantis, but the price is a bit too steep for me at the moment...