While I understand how important it is to relate the entire question to personal experience, stepping outside our own needs and assessing essential functionality should be a broader question to be addressed. In some businesses, I am sure that the GPS tag is essential, but having that accomplished in-camera is nothing more than a convenience. Beyond that, AFAIK a GPS unit never made the image itself better. However, there are times when having fill flash as close to the optical path is very helpful - even required - to get the best possible image. Those who brag that they have never resorted to use of an on-board flash are simply admitting that they haven't figured out how to use a benefit of the camera creatively - making an image better.
It isn't an essential need. I spent years shooting with a camera that cost 3x as much and didn't have the on-board of flash. However, I never viewed that as a badge of honor. I could have gotten better shots on occasion an on-board flash available. For the vast majority of shooters who explore those benefits - some good shots will be missed. Not sure GPS can make that claim - ever.
---------- Post added 04-23-2015 at 06:59 PM ----------
Originally posted by monochrome Type: Clip-on, P-TTL auto flash unit with series control. (Copied and pasted from the website Features).
I THINK series control means it can trigger remote flashes. As usual, the Ricoh US site is light on details and details are in Japanese even on the English pages on the Home website.
It weighs less than 5 ounces (ex-batteries, 2x AAA) and is only 1.20 inches thick. GN20 for 100 cycles.
No doubt, it will serve as a controller - barely. It has full flash and 1/4 power as your only choices. As opposed to the eight power settings on the K-3. The 201 is a 20m flash - not really much more than on-board, actually. It takes two AAA batteries which means you'll get about 25 shots out of it. It almost certainly will be the definition of a garbage flash.