I don't have the stardust, but I have the Alexandra in gold shimmer, which is the same kind of leather you're talking about. I've only used the bag a few times, because I'm afraid it's too delicate for everyday use, and it is. It's a gorgeous bag, but definitely not something I would choose to wear on a daily basis.
I used Apple spray on it before I carried it, which was a great call. When I got it, I was so excited to wear it and absent-mindedly paired it with a new shirt. Bad idea. There was slight purple color transfer on the back of it by the time the day was over. I was able to get all of it off with a Q-tip dipped in alcohol, so it wasn't a big deal, but lesson learned, because I could have really ruined it.
Would I repurchase? Yes. I was expecting this and knew what I was getting into when I got it. I take great care of my bags and have one from 2008 that still looks brand new. When my bags are not in use, they go in their dust bags and in a gift box, and this one is no exception.
If you are going to get it, definitely spray it. Apple spray is completely safe on this leather (which some people have no idea since it is so delicate!) and left no residue, smell, or marks when I applied it. Good luck!