I decided to try these props I had ordered awhile back. All my impressions are subjective but I like the props. They seem to give more lift, at least when the battery is at full voltage. I believe it has a more responsive climb with the gimbal and GoPro. As the battery nears empty Iris still loses a lot of power and gets sluggish. Also the props seem to have quieted the bird down a bit. Lower RPM at a given lift... seems to be a lot less buzzy.
If you get these you need the DJI prop nuts (these are backwards color coded from Iris+). And they (the props) come with little plastic spacers, one of which fits between the a portion of the prop bore and Iris+ motor shaft.
I think this is a good upgrade. Also looking forward to trying the Solo props that were mentioned here as working. Those are 4.5 pitch vs. the APC 4.7 but shouldn't be much different performance.