oddly, I've found car play functionality and sound quality to be awesome. .... i also have hearing damage, but, it's almost as good as my ford F trucks. the maps freeze 1-2 times per long trip, once causing me to drive 40m on the wrong highway, but I was in a zone too.It’s not great voice quality - but there’s cabin and wind noise, speaker/mic quality etc. Seems fine for a 4x4 TBH. If I’m on an important call I pull over and just use my phone speaker - all Bluetooth has some cutout.