Nice little functional kit ..
For ESP8266 - 2.9" ESPaper Plus Module, WiFi ePaper
I purchased two of these kits to function as components in a larger system composed of MagicShifter3000's (http://magicshifter.net/) scattered throughout the studio, with the ESPaper module to serve as display interface to complement the MS3000's LED-based interface. The kit arrived, I unboxed it, flashed it with my ESP8266 OS (derived from the MS3000's OS), added methods to display diagrams and technical info, and .. voila .. project finished! (Well, almost..)
The fact that the ESPaper Plus Module works out of the box is very appealing, and as a developer I appreciate the attention to detail. The only issue I have is that I feel that the kit should come with a small bit of paper documentation, perhaps listing the most relevant Git repo's for other developers to check out and get started - I admit that it took me a fair bit of poking around blog.squix.com and the Daniels' personal repositories to find the libraries I needed. However, it wasn't too much effort.
I was a little disappointed that there wasn't much of a demo app installed on the ESPaper kit, out of the box - just a simple logo display and not much else. Would have been interesting to have some kind of dynamic content on first boot, rather than just a static image display - however maybe this is something for future revisions of the finished product.
One other suggestion I would have is to get support for the ESPaper pushed upstream into the platformIO eco-system - I'm using pio as my build system primarily, and would love to have an 'out of the box solution' in the pio scene, somehow.
However, it didn't take much effort to get started - mostly due to the wise choice to use the ESP8266 as the CPU .. anyone with any experience with this module is going to find it very easy to get started with the ESPaper.