I've only had experience with one funke in a friend's aircraft and it was a pita to get adsb out working on it, it had some non standard stuff going on in its firmware and had to be shipped back twice this was some 5 years ago so maybe they sorted that
P.S. I can echo the positive earlier comments about Trig Radios.
I,ve fitted a few to my own and others aircraft and all have worked well