I would love some feedback on how this bag is holding up and how you have been liking it or disliking it. Also, 25 or 30? I have a 30 speedy B in Damier, but I was wondering if the 25 was nicer in the black leather? Any input at all would be great! Also, has anyone bought the additional strap, to enable carrying it on the two different lengths, like the original speedy b three piece straps? The 25 comes with the long crossbody strap and the 30 comes with just the shoulder strap. Thanks so much!