First, as for most of my figmas, I loooved the amazing art job on him. He even had the vampire bite marks on the back of his neck. And of course his faces where perfect. Plus you can see his watch on his right hand through his sleeve. He's approximately 14 cm, which isn't a bad size. Usually the size for most Max Factory figmas.
He comes with four extra sets of his own hand and he also comes with Hitagi Senjougahara right hand holding a blue pen, which she uses in the show. He also comes with, 2 other faces, a school book bag, an extra hair piece, and a blue spiky thing that connects to his stand and back.
As for flexibility, pretty good! You can psychically do almost anything with him. I only dislike that his head won't turn right or left. Slightly, but not really. He moves down, and can look straight ahead. It's not much of downside though.
So wrap-up, you love Bakemonogatari, or just want Araragi-kun, I say you defently should get him!