I have been using an American tourister college bag since last 2 years. But till now I have not faced any problem like the chain or any wear and tear.
The quality of the bag is good. Looks is also good. I only face a problem that the books which I keep at the back chain bends. I don't know why. It's a water proof bag and the water proof is good. The material of the bag is good. I wash it in 2-3 months and it looks like it's not a old bag. The design and the logo on the bag is still intact. There is no chain damage also. I recommend American tourister bags to every one.