I have quite a few Calfskin bags (not the Vibrato - but ones from prior editions), and I just LOVE, LOVE, LOVE the leather on these bags! Kind of surprised that Balenciaga is now putting "be careful" messages in their bags, but I think they just want to cover themselves. Anyhow, I have found these bags to be quite hardy .. more-so than the Agneau, that is for sure! Plus, over time, the leather becomes so lusciously soft and smooshy .. I'm a huge fan!
PS: Sorry for any grammatical and/or spelling errors; on major pain meds due to back issues - uggh!