I read the whole thing. Binge-read all the ones that were out until Robert Jordan died, then had to wait for Sanderson to pick up the rest of the books... By then some details were a bit fuzzy but I still loved it. I'm guessing that if you read them all in a row now it's going to be even better.
I highly recommend them (and anything else by Brandon Sanderson when you're done - I LOVE his stuff - Mistborn is great but the Way of Kings/Words of Radiance is the best fantasy I've ever read). Want to reread them one day but we've moved twice since so I'm just not sure where the books are at this point, and I have other things to read before I commit to another year of it, lol.