I enjoyed building this clock. It's got loads of functionality and with the possibility of additional shields there's plenty of room to keep on changing it up if you wanted to. I like the way the tubes solder to the board with the wires going into slots rather than through holes as this would make replacement much easier.
The Clock board was easy to assemble, however there are errors in the documentation that need correcting. Resistor color codes for example. Calls for a 1K and lists the colors as brown black orange gold, when it is brown black red orange. A 10K is listed as brown black yellow gold, and it is actually brown black orange gold. I know my color codes and caught this error however a novice might miss this and install the 10K into the 1K position. Also R6 was shipped the wrong value, as the manual calls for a 0.2 ohm resistor and the only one of that size was a 43 ohm. Other than that it worked first try. You can see the build of this on my youtube channel here: https://www.youtube.com/edit?video_id=Huu2eYouKb4
This clock is simply amazing. Tiny, yet powerful and flashy. Assembly was a breeze, with clear instructions and well packaged parts. It worked as soon as it was powered on. The documentation is a little bit old and not much maintained, so it is missing some newer features, but, since the source code is open source, quickly could find whatever I was missing. Communication with seller was very good. I ordered additional shield to use with the clock. This device is going to have a special place at home.
It's a pretty nice kit. Everything seems to be high quality. It has easy to follow instructions and didn't take long to put together. As far as function. I haven't had it long enough to really give it a test.