The Lowepro Fast pack 350 is what I use when I need a rucksack style bag. I also have a Slingshot 102AW for everyday carrying. This is a single strapped back pack. I have had the 350 for a year now and have found it very comfortable to wear and be very user friendly. You can access the main camera compartment by simply swinging it off one shoulder to get the camera out in asimilar fashion to the slingshot. Being able to carry a laptop is also very handy for holidays and away days in the 350. I paid £40 for the back pack from Amazon in Feb 2012 I think the slingshot was about £45 from The now deceased Jessops. Think both bags are great.