We specced this as, when we rented a van we didn't really use the load through space - or when we did put something in there we found it would move when we got the table out and then we couldn't put the table back until we moved said item out of the way. Having an extra drawer instead seemed like a good idea as all storage space inside is precious on a long trip (although I can equally see that if you do have something that needs the length in the boot of the load-through space then that might be critical so it depends what you like to pack).
We didn't order the drawer to have the additional storage net, that just happened to come with it. However, now we have it I love it - we nearly always sleep up top and having that net to put things in is incredibly useful, you can put an awful lot into it. It does get in the way of the camping control console, but I found that I can push it inside out during the day so that it sits above the console.
The other use for the storage net is when trying to close the roof hatch. I'm almost certain that we have the new new bellows as we spent 3 weeks in a rented van with the old leaky bellows in the summer so were very used to the way they looked and each time I get into our new van and put the roof up I'm sure the interior material looks very different. It is also an absolute pain to fit inside the roof hatch, so I think it is thicker. I've discovered that pulling the storage net flat across the roof hatch area before putting the roof down can make it a lot easier to try to tuck the roof material out of the way of the runners!