I've been using this bag now for a couple of months. The 4 separated compartments are very useful for separating different items from each other.  At first use, it seemed kind of flimsy, but is holding up very well.  I use it every working day for carrying my Kindle, keys, cell phone, snacks, markers and pens.  The zippers and carrying handle are quite durable.  It is also very lightweight, much better than the backpack I use to use.