Jack Spade Work Twill Haversack Review

I have a small Jack Spade messanger bag that I bought from the Greene Street store from a very long time ago. I use it my weekend city bag all the time. Now that I am in Shanghai, I do not have a car and I run around the city a lot more on foot and subway. I need a slightly larger bag to carry my stuff. So when Jack Spade ran a secret sale earlier this, I bought myself a new bag -- a grey work twill Haversack messanger.