This really is a very good bag. It has plenty of room for my current kit and more for my future purchases. I have my body with a 35-70 lens fitted, a couple of primes, my Sigma 70-300 APO (fitted end on so only takes up one segment) and a couple more small zooms. I also have room for my little point & shoot and my Canon video camera. That lot has taken up a little over half of the segments in the bag. there are some lovely little pockets to hold memory cards in their cases and also a bigger mesh pocket. All of this is stored in a very well padded section and the zipper is against your back while wearing the bag so your kit is nice & safe.
There is another big pocket which is big enough to hold a small laptop. I have my filters, leads, cleaning kit, chargers, etc. in here. There's enough room to store a light coat too. There are a few little pockets inside this compartment for pens etc and one of them has a small clip to attach your keys to.
On the outside of the bag is a facility for attaching a tripod / monopod. A little pocket unzips from the bottom and is big enough to hold 2 legs of a standard tripod. There is an adjustable clip further up the bag to hold the pod in place. There is a provision at the top of the bag to put a small garment like a coat if your pocket is loaded with other items, This consists of 2 clips, one either side of the top. These clips can also be undone and clipped together across the back of the bag as a second pod securing strap and with both on the pod really is rather secure.
The all weather (the aw in 400aw) cover is very easy to use and covers a substantial part of the bag. I would be confident in this cover in all weathers except for maybe a monsoon. The cover can not be used at the same time as the tripod holding system.
The only things left are the strap system which consists of very well padded shoulder straps with a height adjustable chest harness and a very comfortable waist strap system that also holds the bag as a table when you spin it off your shoulders to access your kit. This system really is very good and holds a lot of weight and also keeps your lovely bag out of the dirt. There are a few loops on the bag and straps to take the Lowepro expansion pouches should you need them.
This bag is not cheap but if you're looking for a large, secure bag to carry, and keep dry, a lot of equipment then this is the bag for you. I can recommend it readily. You will not be disapointed.