1: It only has binding material at the front I think. It's the tri-top one from underworks, so it reaches just to the bottom of my ribcage.
2: Yes this is probably a good idea. I only wore it for an hour the day I got it, but I ended up it for 6 hours yesterday. I guess I'll only bind when I'm going out for a short amount of time.
3: My posture might be quite bad? I always slump forward when I walk or sit down so that could be it.
4: I'll try to remember this (along with kraken's advice - thanks). I don't want to break any ribs or anything
5: Fairly sure it's the right size, since on the measurements I was between small and medium, and I went for the medium, so I don't think I need large.

Just realised I'm taking up this thread talking about myself, so how's everyone doing? Anything cool happen in the last week?