I had the common random crashes with Word 2016 for the Mac, but the recent updates (from Microsoft) have fixed them. Recently though, with 10.11.2 and Word 15.17, Word experienced "difficulties". I let it try to recover my file for nearly an hour before giving up (the text was OK, but the graphics in the file were corrupted). I had a Time Machine backup, so I lost less than two hours of my time, but I now frequently back up to TM manually (well, as manual as you can get with computers). I am trying to completely wean myself from Windows (with Parallels), and none of my (Windows) clients have complained about their edited files since I switched to the newest Mac version of Word, but I am still concerned about the stability of Office 2016 for the Mac. I don't know, though, why it is so painfully slow to open and save, not that I'm pressed for time.