Ultimately, there are lots of good choices out there. Some people take real pleasure in sharpening knives. It becomes a hobby unto itself.
For me, the pleasure is in using the knife, and with a toddler, wife, home, two dogs, and two jobs (self employed at both), I'm not exactly flush with time. I have no doubt that I could get similar and maybe even better results with other sharpening systems, or with the old sandpaper-mousepad trick. But could I get that mirror polish and hair shaving edge with less than 10 minutes invested? No way. The Worksharp is the only system I can find that can keep me up and running with great edges while short on time. For routine maintenance, the fine and extra fine belts are probably take about the same time as a quick strop, so it's not much gain there. But when a blade gets dull enough that one would need to hit the stones, the worksharp really shines.