I need to buy a Hydration system and basically my favourites are the Source Vector and the Camelbak blowfish. An earlier thread discussed the Camelbaks at great detail, but nobody had anything to say about the 'Source Vector'. I am sure I have read somewhere that is as good as the camelbak, but cannot remember where. Any comments about the Source?

The source Vector is a very well thought-out bag with loads of handy pockets to keep your odds & ends safe. Very good bladder & the vented back works very well, all you get is small damp spots where the pads touch. Good raincover included. Downsides?-the top closure tends to compress the whole bag but that is easily cured by adding a couple of extra cord clamps at the top opening, The valve is quite easy to accidently open if the bag is clumsily dumped on it, and it takes a while to bed in & become comfy.