I have 5 hydration packs and this is my go to pack for most rides. I forget I have it on. I hate a sweaty back from packs. This alleviates that problem. My back is so much cooler now. A Syncro 15 is my choice for longer rides. I have the Syncro 3 pictured with a full bladder and an Osprey padded organizer loaded with a rain jacket, co2 and a few tools. I run the lid lock through the organizer strap to secure it when riding. I recommend picking up a bite valve cover. Works great keeping out dirt. Pardon my dirty pack, it gets lots of use. Pros: light, no plastic taste, easy clean bladder, secure bladder closure, quick release hose, bite valve, shove pocket, zip pocket, trampoline back, cool on your back, lid lock, breathable straps, Osprey quality and warranty Cons: people may not consider it due to the price.
Zach the O