4 stars for the Buttermilk Bar, 2-3 stars for the Original Glazed Donut and Apple Fritter.
I came in on a Sunday before heading to the airport, and it was empty at 4:30pm. The donuts didn't look that appetizing in the case, but we figured we had to at least try them since we were already there. I ended up purchasing a dozen to bring back for my co-workers ($7-$8, http://www.yelp.com/biz_photos/bosa-donuts-scottsdale?select=644Utn9Y4lqV4i5K6pD3pw#644Utn9Y4lqV4i5K6pD3pw), and we tried:
-Original Glazed Donut (http://www.yelp.com/biz_photos/bosa-donuts-scottsdale?select=644Utn9Y4lqV4i5K6pD3pw#BI5rlLME1mQCFE3M0iw8pw): Pretty decent. Definitely nowhere close to the best glazed donut I've ever had, but it was a good donut. Not as fluffy as I'd like but at least it wasn't super sweet.
-Apple Fritter: Eh.. skip! There was too much cinnamon flavor or something, and I didn't like this version of the apple fritter at all.
-Buttermilk Bar: The best out of the three! I normally don't get buttermilk bars, but wanted to try it since it got such good reviews, and I wasn't disappointed! I loved the crispyness of the outside and the glaze. It was a little on the sweet side, but not too bad. Highly recommended! They also have a chocolate covered buttermilk bar but apparently those sell out early.
Although it says "Best Donuts in Town" on the Bosa Donut box, don't have too high of expectations. At least the lady who was working here was really nice and parking was plentiful. They also have boba drinks available and shaved ice if you're looking for something other than donuts.