This is a GREAT rolling bag, but BARELY USABLE AS A RUCKSACK. It has good sized compartments, a neat laptop compartment and a very handy external small zipped pocked for all the things you need again and again on a journey. The pull-up handle is one of the smoothest I have ever found on a rolling bag, and the handle is comfortable. As a reasonably tall person, some handles are just not long enough but this works brilliantly.
Having just used it for a work trip to London, the one disappointment is the rucksack function. To `turn' your roller bag into a rucksack, you have to pull out the handles and attach them on some hooks. There is no way to do this quickly so if you start off without them then you would be loath to stop en route. Alternately if you start with the rucksack handles deployed, then they drag on the ground and get caught in the wheels when using it as a rolling bag. But the killer reason why this is useless as an interchangeable rucksack/roller bag is that once you have rolled your bag through a dirty train station, airport or along the street, there is nothing between your back (which could be covered in your expensive suit, or perhaps a white shirt or T-shirt if going on holiday) and these now dirty wheels, which rub on your back, leaving indelible marks. I sometimes feel like I've been run over by the end of a business trip, but I don't want my clothes to look like it.
In summary: this is a top notch, excellent roller bag, it is not much use if you want to quickly switch between roller bag and rucksack.