Love my new Salomon XA advanced skin 12! Had read about them on the ultra168 website, and then happened to bump into a girl using one later that week. Put my order in for Christmas and loving it already. Initally I got a little lost finding where I had put everything (it has so many convenient pockets!), but it fits like a glove, doesn't overheat me, and everything is pretty much in reach. It only comes with a 1 1/2 L bladder, but am told you can easily replace it with a 2 or 3 L one - yet to find a stockist for the two litre salomon however. The bladder clips off at the hose - so don't need to unthread it when refilling, and everything has a convenient store location. Am using a couple of nathan bottles of electrolytes in addition to the bladder, and just love it!
PS the racing the planet store in Hong Kong has current stock, $20 delivery fee to Australia regardless of quanity ordered, and delivery took just over a week!
http://ultra168.com/2011/09/21/review-salomon-advanced-skin-12-l-s-lab-pack/ http://www.racingtheplanet.com/store/salomon-xa-advanced-skin-12-s-lab.html