tripp:Dingbatt:
How do you intend to set it up? Perhaps you could prevail upon them to allow you to use Smart Switch (phone to phone, maybe using USB cable) in the store before you depart with the new one.
It do use the cloud sync setup that samsung has which works with most stuff (takes about 60 minutes for it to install everything etc). But I use nova launcher (can restore home screens etc from a backup). It's things like android wear, bluetooth to my speakers, headphones and car. Music downloads, logging in to everything, security app setups, home lights setup etc, secure folder and work setup. The service desk at work is getting sick of me and resetting of my security tokens.
Yes my biggest mistake was not backing up my Apex Launcher settings, although I am using the edge screens with this phone so a bunch of things aren't required on the home screens. Glad I have a completely separate work phone so the IT chaps can worry about that.