Overall I'm pretty happy with it, but I'm a bit sad that I can't use this with boards where pinheaders are already present. Would have been nice to have a standard 2x3 ISP socket on it and change between cables, pogopins and avr clamps. When it comes to power, a little regulator for 3V3 would be nice too. Basically switch between 5V, 3V3 and selfpowered. 

On the plus side, I'm using this quite heavily for my #K.I.T.T. - KNIGHT RIDER badge/brooch and #sloth badge, as well as unbricking the attiny on my #LAMEBOY - another ESP12 handheld