Interesting about the recipient. I have definitely messaged the same people I had horrible duplicate issues with since I changed the backup & sync settings - no dupes. So I can't corroborate your experience there.
Probably 75% of the people I text are on iPhones, so interacting with the iMessage platform.
At this point my only real wish is for support for RCS messages. That would make this app very complete for my use. I am messaging with a number of people on phones that support RCS, and they don't even show up on Your Phone. I have to switch to viewing
my phone screen on Your Phone, open the phones messaging app, and respond there. I can still use my keyboard, but that's still a pain to have to do, and I've missed a few messages because of it.
I use that same method of accessing my phone screen to use a productivity app that is only available as a phone app, which saves me having to have my phone in my had for hours while doing that work. Useful stuff.
Jeff A.