I turned it off a long time ago when it started replacing entire sentences. So annoying!!
I still have the suggestions on but I might turn that off too because it keeps suggesting words in other languages even though I'm on the English keyboard and don't know much in any other language (and the only other keyboard I have is the Spanish one).
Also the dictionary doesn't have a shit ton of common words in it for some reason, so if I can't think of the proper spelling I have to look it up anyway. Which is also annoying because search engines suck and I never have a hard copy handy.