I bought the Boss micro BR last year. I returned inside 2 weeks. Not to say that it was a bad unit, on the contrary, a very powerful tool loaded with options.
The size was what attracted me at first but it was the size that changed my mind as well. Its compactness lends itself to not so user friendly if you're a knob turner. Since then I bought an iMac and have used that (not much though).
Currently I am trying to figure out the full capabilities of my Digitech jamman.