I used the Harrar "Blue Horse" in my regional competition round, 3 weeks ago. I had it blended with a Sumatran to stabilise it, and when it was on..... IT WAS ON
That sensational blueberry was awesome, but unfortunately we found it too fragile in the end, so I'm moving to another blend for the Nationals.
We found there were quite a few "Fermenteds" in the Harrar we had, which I really liked. It makes for a lottery though.