I have the 12 and only it for a few months and have only used it a couple of times. So far its aging ok with a few scratches but doesnt look bad at all. I took the bag into my local SL boutique to inquire as to why the bag scratches so easily. I mean I can literally scratch this bag with my fingernail....The reps told me it was just the way the leather was made, very delicate. The rep then stated most people didnt mind because it gives the bag character....They then advised I could avoid the bag scratching so easily by using a good leather conditioner on it. When I asked which one the rep said they do not recommend anything paticular and advised me to go to a high end cobbler or leather repair shop to get a recommendation. I have not done so as of yet......Also, if you are the type of person who wants a structured bag this is not the bag for you. The bag does slouch however, it depends on how much stuff you carry in your handbag. Im careful not to overload this bag because in my opinion the suede lining inside the bag makes this bag a little heavy already. I have noticed when i carry it by the handles versus on the strap I get less slouch however, it looks good both ways so i dont have a preference.
Hope this helps....