This is the best hydro bladder that I have ever used or heard of that is also well worth the price. The liner that Source says doesn't need to be cleaned is exactly as it is marketed ( although I recommend washing it anyways) it also doesn't have a plasticy taste at all. The bladder also has a detachable hose which means easy cleaning and storage. The valve can also detach letting you replace it with various other valves and accessories. The Source bladder also has a top handle piece that can be slid off to open up the inside from the top this makes it super easy to fill.
Microbial lining makes it much lower maintenance
Extremely modular hose and valve
Lots of accessories
Top handle piece can open up the bladder from the top
The top piece/handle that slides on and off is a little to big for some hydro pouches\
There are no other cons I can think of for this product