So first impressions of the Galaxy S6:
-Fast, but...
-World's worst text messaging app. Have a bunch of old texts on your phone? It's like taking a typing class in 1990, i.e., type your message, and wait 10 seconds to see it. Apparently a long-term problem that has yet to be resolved. Already dumped it for a different text messaging app which works fine.
-Holy bloatware. Between Samsung apps, AT&T apps, and all the Google ****, the phone felt like a damned Geocities webpage when I first used it. Some of it you can't get rid of, only "disable" it. Starting to feel like all of the Google **** is just as bad as Apple.
-The menu navigation is meh at best. Some settings are in-app, some settings are from one of many screens in the settings menu, not much rhyme or reason as to which. Default for all the software is that EVERYTHING gives you a notification, and I did not see a way to default to off, then turn back on the ones you want. So it took forever to go down the stupid list to turn off all the ******** app notifications. It was also auto-installing all the apps on my Google account, which ROYALLY pissed me off. I had a bunch of stupid games on my tablet that I have no interest in having on my phone, and it took the liberty of installing all those when I wasn't watching...
-My email is acting quirky. There are a multitude of "sync" settings. Desired output is that I want only my work email to sync/refresh real time, and the rest just when I check on it. Took forever to figure out that the "master sync" defaults to off when you get the phone, and is not where you'd expect to find it.
-The camera is pretty awesome for a frickin' phone.
-I HATE the fact that you can't (or at least I can't figure out how) have stuff "wake up the phone" for visuals. e.g. - on an iPhone, the phone would "sleep" with a maps app, but when approaching a turn, it would wake itself up, give you a voice instruction and visual, and then go back to sleep. Best I can tell, the Android phones don't do that? (If you know a workaround for this one without a third party app, please let me know.)
All in all, impressive piece of hardware, not enamored with the UI. I much preferred the OS on my Nexus tablet to this.