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When printing color on 8.5" x 11" paper, everything is fine. The picture print quality is decent, not amazing, not awful. But, if you print on, say, glossy 4" x 6" I found it insanely difficult to get the contrast correct in the photos, as they were either too light or too dark, and I found that printing on 4" x 6" on any device resulted in a cut-off or un-resized print.
Secondly, setting a password on this device for WiFi is annoying. I understand why Epson chose this as the best option, and don't get me wrong, it isn't awful. But it is reminiscent of an AM/FM clock radio from the late 80s and 90s.
We liked
This machine is incredibly easy to set up and use. It's ridiculously lightweight and portable. It's an almost-perfect printer for the traveling business professional or anyone who needs a printer that doesn't take up much space.
We disliked
Color quality on prints took a bit to figure out via contrast and color saturation. Also, printing photos on 4" x 6" high gloss paper was inconsistent across devices. I tested this on an iPhone, Macbook, Windows 7 PC, and an Android and the prints all came out different.
Final verdict
The Epson WorkForce WF-100 is perfect for the user who travels, or even for the space-conscious or low-printing consumer. The built-in WiFi makes it easy to print on multiple devices and the built-in rechargeable battery is very impressive.