I've found this to be a great feature with my 3880 this winter where the humidity is low, even in NC. Until this winter I experienced about one nozzle clog a year. Now I get one every week unless I print something daily. With Qimage I can run a nozzle unclog for one color to unclog the nozzle that shows a bad nozzle check pattern. Really saves ink. If all nozzle show clogs you can run the utility for all colors. Qimage says their utility uses less ink than the Epson nozzle clean utility. Qimage also says that if the utility doesn't produce a good nozzle check, then you should run the Epson nozzle clean utility.
Great idea and wonder why Epson didn't provide such a utility.