I have a full sized Calista in Midnight Blue and have worn it a lot, no signs of wear, but then of course Calista has NO corners. And I guess Sabrina has the most pointy corner of any bag design...
@AliceWondered recommended Renapur for Tuscania, and WOW,- the effect was really impressive. I put Renapur on one side of the bag (leaving the other side untreated (in wait for Bick 4 recommended by
@TotinScience). Renapur so totally moisturized the Tuscania that I would actually recommend using it sparingly, but definately to use it for Tuscania if you feel the leather needs some moisture/TLC
I too find the regular Calista a breeze to get in and out of, it sits well over coats and it sits on my shoulder as if moulded on. It is my most comfortable shoulder bag. I would not go for a very dark lining, as I imagine that might make visibility a challenge,- dark grey works fine for me.