SOURCE Product Reviews (Page 41)
The only drawback is the company reps should include the data sheet PDF info with the packaging, in a thin fold-out between the valve and the cardboard. The warnings we didn't know about children and the softness of the valve until too late.
The Source one had no such problems!
Never leaked - even under a full, oversized backpack.
Downsides- Closing the bladder's top can get tricky if you really want fill it up all the way, and it isn't comfertable to hold outside the backpack (but not having a handle saves space... so...)
All in all - the best bladder i've used. No leaks, No smells, the tube comes out, and it can stand a LOT of pressure.
Way to go!