I recently purchased several of these for a project and was impressed by the quality, the speed of delivery and the low price. It assembles in less than 5 minutes; the instructions and board markings are really clear so there isn't a chance of putting a diode or capacitor in the wrong orientation. The center hole for mounting and tiny footprint made it very easy to work into my project.
I got the pink and blue LEDs. The 3d printed base that holds the battery fit perfectly into this green mason jar I had and it looks really cool. Amazing to see how much power is left in the 'dead' batteries! Thanks for making this!