It is kind of ridiculously bulky for a bladder, takes up too much space in a backpack and is kind of heavy too. Thankfully you can wiggle the bladder out of it and just use that. The padding is good for keeping water a decent temperature in cold weather. The hose is also obnoxiously long. But, all in all I haven't had any problems with the system breaking or anything and it works as advertised.

I bought this pack for my mother who has cancer. She can't get out of bed very often and it's imperative that she stay hydrated. So, I bought this pack and slung it to her bed post filled with ice water - genius.

Great way to stay hydrated when hiking. This is a great way to add to an existing backpack that doesn't have an hydration pocket or if you want to have it on the outside of the pack for easy access for filling. Insulated bag did a great job of keeping water cold. As already mentioned, some insulation for the tube would be good as it heats up when walking in the sun.

Just got one of these. It's pretty sweet. Keeps stuff cold for a nice long while. It fits in my Osprey pack a little tightly. The hose is plenty long enough. I just wish there were a magnetic spot on the bite valve like my nalgene bladder. But this bladder is better. A bit more sturdy. I've already put this through the runs.

Taste-free water. Bladder doesn't absorb taste if you put in Gatorade or something, as long as you dump and rinse when after use. Cleaning tablets do job the if you don't. Heavier than the bladder alone, but keeps water cold for a pretty long time, a trade-off I'm willing to make.

I love this unbottle. I have several bags and I'm able to put this in any bag or attach it to the outside. I have the North Face Surge and it only has a laptop pocket but with the unbottle it becomes a reservoir bag. Good stuff. Go for big one if you have a choice.

1. The camelbak will leak out of the bite valve if the valve isn't closed while you are hiking. 2. The water will taste like plastic the first few times you use it, but it does wear off. 3. Buy a valve cover with this to keep dirt from getting in your grill.

Great pack for hydration. Well worth the price. The only downsides are that the water in the tube does become warm quickly, and clips would be useful. The pack keeps water cold for a long time, so after one sip you're back into cool water territory.

You cannot go wrong with camelbak, they really do make the best hydration systems. Extremely durable, will not burst or leak even under a lot of pressure. The tube is long enough to reach your mouth even when using big backpacks. I recommend getting the cap to protect the valve. It gets dirty, it's kinda of annoying to buy extra stuff that should come with the bladder, but is is worth it. There is no after taste and it keeps fungi free for quite a long time. However, proper cleaning especially of the tube is recommended. I do not recommend using it in alpine hiking (cold temperature), more insulation is needed. The whole thing froze on me while climbing a glacier in Ecuador. I reached the summit without drinking any water!

Works great. Quality construction. I love the huge opening for the reservoir, which makes cleaning it out wonderfully easy. I wish the hose had some neoprene insulation around it -- more for protection than insulation, really, but it's a minor drawback. Can't beat a lifetime warranty. One warning: you better have a pretty strong grip and decent-sized hands to unscrew the lid -- it's REALLY tight.

There's not a lot to say about this thing. It holds mass amounts of water, seems to be extremely durable and easy to make a pack out of it with Osprey bag straps used as shoulder straps. The bite valve seems to wear out fairly quickly but with the lockable L-valve there haven't been any leakage problems. I looked at this mainly as just a more durable bladder, which it definitely is!