Before buying this bag I've only ever used laptop bags that have come with my laptop or been provided by work but I'm so glad I invested in this one. When carrying my laptop I usually like to wear my bag over my shoulder but I often get about by bike too so need a backpack as well. It's great that I can now do both of these things with just the one bag... no more moving pens, notebooks, flash drives etc between bags and leaving them behind!! The short handles (I guess the 'tote' part of the 3 in 1??) also come in really handy on the tube when you don't have much room. The clever, sleek design means that when using the bag as a backpack it's far less bulky than my old laptop backpack was but everything still feels secure and well protected with plenty of compartments, pen loops, etc for everything I need.
As the previous reviewer has said, it's not the cheapest bag you can buy but it's great quality and so practical that I think it's well worth the little bit of extra money. And if like me you can replace a normal laptop bag and a backpack with just this one it's really a bit of a bargain!