Fantastically written pattern, really easy to understand.

I was scared of the cluster stitches because of previous experiences with Brioche decreasing, but it was a breeze thanks to the instructions.
In the row after the clusters: slip the k st and p the yos in the cluster to create a nice, even star.

Also, remember to keep color A behind and B in front at the end of each round for neat color changes

All went well until the final 5 to 1 decreasing. Somehow I ended up with one less stitch than I should have had, and could not for the life of me figure out what I did. But I just went with it since I was so close to the end and it seemed to work out fine overall.