I've seen the first two so far and they didn't convince me for the 3rd. I'll probably go because my GF wants to.
The problem is that The Hobbit is an entirely different book compared to LOTR. It's a childrens book, a soft introduction to Middle Earth, not an epic fantasy tale. It should've been dealt with in a different way, not as a "we made a shitload of money, so let's make more LOTR movies" prequel. It basically fell into the same trap as the Star Wars prequels - the attempt to replicate a success by doing more of the same, completely missing the idea that maybe the first was a success exactly because it was not more of the same, but stood out from what else was on offer at the time.
And omg were they filled with crap that had nothing to do with story or book and was only added to complete some Hollywood recipe.
They should've made it one move, for a younger audience, made by a different director, without trying to make it a prequel and "foreshadowing" everything we've already seen.