Careful on the mini-trekker Mike, I've heard reports that the zips can open when you pick up the bag from the straps. A good Idea is to zip them both to one side or the other but not up in the middle. Some people have also put a small tie wire to tie the two zips securely.
Apart from that it's a great camera bag !
Houghy, it sounds like we'll be hitting your local shopping establishments on Thursday....