I thought it was great; as I have often said, if you look for historicity in Hollywood, you will forever be disappointed. If it were a documentary, I'd call it to task as well, but its just a movie, made for entertainment purposes only.
Perhaps the biggest key to enjoying medieval themed movies ... Movie vs Documentary. If you look for history in a movie, you're going to have a bad time.
I should make that my sig line considering how often I've said it. You're setting yourself up for disappointment if you're looking for that.
With that said, I find it somewhat odd that he liked Season of the Witch (which was absolutely horrible, special effects aside); Black Death was a gritty medieval horror but nothing about it was historic, except for the plague which also named the movie...I actually liked it for the ambience. I liked Scott's RH too...again, nothing to do with historicity and everything to do with watching a good movie.
My favorite RH is the Kevin Costner one...that in itself would probably get me drummed right on out of a medieval society if I actually believed any of it. Who is to say that one or the other has the right of it when they can't even prove he actually existed? As far as I was concerned, Scott's RH had most of the principal characters, and I didn't mind the changing of the backstory (instead of being noble-born he's a commoner, but that's fitting) and I thought the setpiece battles were pretty good...altho you could tell Oscar Isaac had never really ridden before- at least not ride and wield a sword but hey, its a movie.
I liked A Knight's Tale too...I've seen it a few times, I like the jousting scenes, and I'm a big James Purefoy fan.