Well, unfortunately I don’t have wireless AA, so the cable can sometimes be an issue. Beyond that, they aren’t huge issues, but if I need to look something up in maps it won’t let me. I know, I’m not supposed to use while driving, but if I’m at a light and I want to do a quick detour search I can’t use the handheld (dash interface isn’t as easy to use as handheld). The contact search\phone app doesn’t work as easily for me and I find the voice search to be spotty.
Like I said not big issues, but mostly just preference; I’d rather have my phone separate and free from restriction as I only use the maps through AA. My phone calls and audiobooks\podcasts we’re always fine through Bluetooth.