"It works generally fine and hassle-free, but at 50% load (typical downwind setting) the prop "hunts" a bit."
Not experienced that in ours - I've been general handling and doing student nav at 50% (105kts) and it is lovely and smooth (and just under 4 USgph). The only time I've really noticed the prop adjusting that wasn't smooth was when a student did a 360 deg steep turn and we went through our own wake - there was a bit of a thump from the prop then.
I didn't start the topic to talk about the DA40 - but as it is still all shiny and new I can resist saying that it is gorgeous and I love every single second in it (and so do the students!).
Would still appreciate feedback on the yaw characteristics on go around of the Cirrus though.
Thanks
Gugnunc