I just posted this at cambags.com. Don't see many people using this bag, so here's a review for POTN.
Equipment in bag: Canon EOS 30D , Canon EF 24-70 f/2.8, Canon EF 70-200 f/4 IS, Canon EF-S 10-20 f/3.5-4.5, Canon Speedlite 580EX, Canon remote release, battery chargers, filter cases, manuals
Review: I purchased the J-2 after my Lowepro Slingshot 200AW became too confining for my kit (The Slingshot's still a great bag for day trips). The pictures show the J-2 will take the the 30D with the 24-70 attached. It will also take the 70-200 f/4 attached.
Quick access to the main compartment is possible with the velcro fastener. That means the clips don't have to be secured at all times during use. (but do use them while transporting). There are plenty of pockets and compartments. Overall, great bag!
Likes: Plenty of space and pockets, not too big, good protection, seems very durable.
Shoulder strap will become uncomfortable after a day's use. Needs to have the Domke USPS pad standard.