Finished Nisemonogatari. Tsukihi Phoenix Arc was good. Interesting characters, solid story/dialogue, good scenes. I don't think it ever really reached the heights of any of the Bakemonogatari arcs, but as a cash-in sequel which are going to be the rest of the books as they animate them, it was enjoyable. It's hard not to compare it to Bakemonogatari though. I remember watching the final arc of Bakemonogatari when they're lying on the grass looking up at the stars and thinking "wow, this is a great end to a great series". So inevitably it's going to be hard to get that kind of feel from any future sequels, though Kizumonogatari can still be awesome since it's a prequel and I'm really looking forward to that.
Don't hate it, don't love it. Was...ok with some good stuff, and some boring eps early on.