I have the Slingshot 200 and I'm really pleased with it. The compartments inside can be rearranged as they are held in place by Velcro. This means you can change the sizes of the individual compartments to tailor for your lenses and gadgets, and the positioning can also be changed so you can get to them while it is "slung", therefore you dont need to put the bag down at all. I guess if you are used to a certain style of bag then a new one could be awkward to start with but I think you would soon overcome that. I can highly recommend the Slingshot series - hope this helps!