I love the GP32 stick, it's just like the NGPC which was my favorite controller for portables.
I don't think it will ever break from normal use. It uses microswitches and those are sturdy. Of course, if you drop your GP32 who knows, just be careful.
Don't know about ASR but Her Knights comes with a red one, I have it. It seems exactly the same aside from color, I don't like the red. I put it on once - it's hard to pull the stick off, and it actually sits on a metal shaft (no dirty jokes now...) so the build quality is better than it looks on the outside.