I have been using the Void Wallet() for over a few months now, and have gained quite some nerd credits from coworkers and others. The wallet looks great, easily stores several creditcards and even a few notes in my case. The component markers and rulers come in handy almost daily.
The button is well done, very professional & solidly built. Only thing is that the solder pads are small, so you'll want thin wires for connecting it. Reading the spec, it is easy to overlook, but worth noting: This switches ground & you need limiting resistors on each of the RGB (+) connections. This is great to show status of something & allow one button to do multiple things based on colour, eg: Green = started, Red=stopped.
Shipped quickly and well packaged. Arrived quickly in the USA.
I just finished soldering this little gem on my Teensy 3.2 and am delighted: it worked great with both the libraries I tried (standard SD library and SDfat library). It doesn't even seem necessary for me to rate Documentation or Communication, because (1) the image on the seller's page was adequate to show me how to connect it, and a quick google search on TEENSY SD CARD was all I needed to do to get up and running; (2) the unit arrived quickly from the Czech Republic with no need to contact the seller. So, perfect scores all around. Plus, at $8 apiece, this is the best bargain I've ever seen!