As a VJ I've always used controllers that are designed for 'something else' - currently an Akai APC40 Mk 1, and while they're great, the opportunity to create a controlller that does exactly what I want with no tradeoffs using Opendeck looked like a great idea.
Ordered the Arduino Mega which arrived really quickly in secure packaging.
I've no background in electronics but the documentation is really clear even for a complete novice and I had a little test circuit on breadboard chucked together very quickly. The web interface for the Opendeck makes setting up the controls very simple and it's well designed too which is great.
I've made a 16 button, 16 potentiometer controller which works brilliantly and the ability to store preset configurations of midi controls on the board (which are stored in memory even when everything is disconnected) really extends the possibilities.
I got in touch with Igor about possible extensions for my next project and he was very quick to reply and even suggested design improvements for my next board.