It's well padded and has plenty pockets for kit however if you are planning to walk with it on the hill, I find it is too low and your heels hit of the muzzle end , there is no adjustment to make it rite. It'll drive you mad!!!
I use the double slings from bushwear and have them fitted to by canvas rifle slip. it takes the rifle with bipod and mod. you hardly know you are carrying it , it's also great just straight onto the rifle.
Just a quick comment on the gunslip/rucksack. Bambislayer is indeed correct it has ample storage, padding etc and is good for transporting the rifle in the vehicle but is not up to use on the hill. Apart from the position of the straps the buckles are made of plastic designed with a plastic retaining catch which detatch themselves very easily. Apart from this the only other downside is its bulk, it takes up a h**l of a lot of boot space.