I use the GConnect implementation of KDE Connect and it works really well... except for the SMS forwarding.
It has all the usual issues of this kind of mirroring software: (1) once in a while it falls out of sync. (2) the messaging UI is really spartan (and for some reason doesn't support OS-level spell check?) (3) MMS support is either spotty or missing (4) notifications occasionally just stop happening.
I'm still grateful for it and use it everyday, but GConnect is #1 on my list of "once I get some time to do OSS stuff again".
