The space is good, and I have had one surefire light, 4 lightsticks, 1 rite in rain book, 4 pens, one map and 2 SOPs (6x10 cm).
I`ve used it a lot during operations and it is a good product for leaders at coy level.
The only thing that i do not like with it is that it is 1,5 cm to wide for me, and therefore takes a bit to much of my vest. It has not been a problem when using my rifle, but for some it might be. Another thing is that it has just zippers, and that is the only way to enter it. For me that has not been a problem yet, but if it had had a smal pocket in front or in the back it would have been much better. Then you could have had an easy accsess pouch for small maps and so on..
But all in all I am very happy with this product, and would give it a 7 on my 10 points scale.