Corners look like they did when they were bought. My black gm has been in constant use for 4 years. I use it for work and travel. I am an attorney. I routinely carry files, a wallet, senate mm with iPad, senate pm as my cosmetic bag, Ulysses gm and various other stuff from yoga clothes to my laptop. Same with my red mm and black mm. The red was the first purchase. It is also heavily used and the only wear it is showing is in one small space along my personalized stripes. I have yellow, grey, green and navy in addition to those already mentioned. All personalized except the yellow. The yellow gm is the newest and it was purchased two summers ago.