the ub1 looks superb too- but i think its only the guys that have a good understanding of what makes a great break out board that are going to purchase them due to pricing etc. the most hobby guys will just be looking for the cheapest options.
i have a big machining centre to help refit (again) after the original expensive servos have been failing. this time with a ub1/ uccnc
the ub1 with extra ports out is break out board porn! -
as i blab on recommending uccnc on fb pages and forums its nice to know what is available and what is compatible to what.