Here’s a quick video I made to show the Blower in action.
I made a test area around an Elm tree that loves to annoy me with seed packs in the summer. Yarbo started out by blowing the outer perimeter, (which I did not expect). Then Yarbo started working the inner area using the new backwards driving feature. And YES, the obstacle avoidance was working. The backwards driving works very well. I wish the mower could do that! 
Overall, I am extremely impressed. I did catch some areas of improvement in my test that I’ll outline in a separate posting. Aside from those concerns, the Blower did a surprising job blowing those leaves and seeds from that annoying Elm tree. The pile in the end of the video was created entirely by Yarbo.