Big minus: no documentation included at all. Nothing. Not even a crazy Google-translated Chinese-to-English pamphlet.Next minus: the wifi antennas shown on the Amazon listing are much larger than what came with my unit. The two antenna in my order were very short stubby antennas. If you are going to operate close to the wifi router, it's not a problem, but if you're some distance away it may be problematical.Now, the plusses: The unit is working well, and it's handled everything I've thrown at it. It has a small footprint, and doesn't seem to overheat even when left running 24/7.I ordered this particular unit because of the four serial ports, as I have some old Ham radio equipment that is pre-USB era. I have yet to try connecting them to this unit, however. (crossing fingers)The video image on a new monitor is excellent. Web browsing is quick, with pages loading immediately.Overall, I'm satisfied with my purchase. (some kind of documentation would have been nice, though.)