I’ve been having a look at this board. Being new to Multiwii and the lack of information and incomplete documentation makes it a real challenge.

At first glance it looks very nice for the low price. Then after some hours you start to find the hidden catches; like, it needs a special interface to connect the GPS.

There are several versions, up to 1.3 currently and I have an earlier version. The main difference seems to be around the I2C/GPS interfacing. This area is not documented (that I can find) and therefore makes applying this board for anything more than a simple KK2 replacement with on-board DSM2 receiver, very difficult; or at least far more time consuming than it should be.

I’ve started making more notes on a dedicated page here.