I bought this bag about a year ago (the green one!).  I LOVE the eye-catching color and am happy that it is stylish and durable.  I get a LOT of compliments on the bag and since purchasing, i've seen 2 more women at work with one. (i work in a BIG office building)

As far as size, i've had occasion to need to fit 2 laptops into the bag.  It is a tight fit but manageable.  I have a sleeve from an older bag that i use w/ my smaller laptop to keep it from slipping around when i'm carrying just the one.  No need w/ the 17" laptop. I have room for peripherals, cords, pens, notebook + ibuprofen and lip-gloss. ;)

These are good quality wheels and roll smoothly on concrete, blacktop, carpet, etc.  I love that the wheels zip off.  The bag is not too heavy with the wheels on but noticeably much lighter when you take them off.  This bag is just as stylish with the wheels off.

Here is the con: the handle style, as you can see from the pictures, has been re-designed.  Mine came with the inverted U handle, instead of the T.  The telescopic part is not very durable and broke about 6 months ago - i tend to fling the bag up the stairs (a few at a time and then walk to catch up) and apparently, the handle can't take that twisting. :(  Since the handle broke, i've been carrying the bag --- i REALLY need the wheels.  I cannot find anywhere, even contacting the manufacturer, to buy just the zip on w/ wheels and handle part.  This seems a waste.  PLEASE make this available.  I really want to get a new one w/ the T handle - it looks like it is built better.  I wonder how i can know which type handle a new bag will have. hmmm