I have them on my P4 Pro V 2.0 and they work fine, look great but I can't tell any difference in the noise than my old P4 with its propellers.
Thanks,
Jim
WA5TEF
I recently hovered two mk1 P4P a few feet apart, one with normal props and the other with the low noise props. There is definitely a noticeable difference in the noise but I've not seen any obvious difference in flight duration, nor have I experienced any change in flight characteristics.