Ok, I have to qualify this slightly (to be honest I was expecting a barrage of abuse!).
The Vango doesn't have much in the way of features - for instance you can't reach around for a water bottle like you can with the OMM, it doesn't have cunning pockets on the hip belt, there's no mesh on the front to stow stuff and it certainly doesn't look "cool" like the OMM does.
However, I can get all the stuff I need in it, it's hydration compatable and what's more, an Alpkit Base 180 mat actually fits in the hydration pocket.
The back length on the Trail 35 is 45cm, same as the OMM Classic 25, so really for people under about 5'7" I suppose. Perfect for my GF though.
I did try a 45 a while back and it fit me fine, so would assume it has a longer BL, since I'm 6'0. Will probably have to try it again, just to make sure.
That is a bargain price! I think I'm going to buy one anyway and send it back if it doesn't suit!
Edited: 26/04/2012 at 16:42