I don't know how it compares to Lowepro, and I don't have a sling version of their backpack, but I have a Kata DR-466 backpack and it's very well made. Of course, I've only had it 6 months, but I have no doubt it'll make it more than a 1 1/2. I keep a 50D, 70-200 f/2.8 L IS, 50 f/1.4, as well as a bunch of other assorted supplies in it. It's extremely heavy fully loaded (which it always is), and seems to hold up well. I'm quite happy with the purchase.


That said, you might want to look at the ThinkTank slings. ThinkTank's stuff is very well made (from what I hear), and the customer service is fantastic. Give them a look before you make the plunge.