Ok...on the Kooba Elisha's, Bonnies, Siennas etc they have magnetic button type closures. My question is, has anyone found that they can tear after long term use. Thats the reason Im hesistant to buy one. My two IF bags have button closures but the buttons are on a separate 'tab' of leather so it doesnt put pressure on the actual inner lining, if you see what I mean, but as the Kooba buttons are acutally attached to the inner lining, Im worried that over time it may loosen and tear. Any thoughts on this please?