At first I was only looking, for a bottle, which holds just in summer the cool liquid. Looking this bottle had the best reviews and habs times closer look - the "strange" for me new hydration system made me curious and I also bought the first 2 bottles.
After the first dry tests at home I was surpised how good but the drink works. For a comparison I have with the standard plastic bottles which are opened to drink the closure with eg the teeth by pulling up.
When the CamelBak hydration flow is much greater, the bottle must be held at an angle and in any event by simply pushing and who likes to suck the liquid light comes fast and perfectly controlled by the hydration system.
But the specific hydration system offers even more, it closes automatically - in other words you do not have to pay extra close, but also not open and is therefore always ready for use.
The bottle is therefore also ideal when eg driving a car because you only take to the bottle and can drink immediately, without having to open a lock or anything else.
But I still recommend to use the optional locking mechanism. Just when the bottle is in bags. When the bottle is full and only a slight compressive force to the housing meets flows out some liquid.
If the bottle is outside, eg bottle holder on the bike, or on the holder in the car which is obviously not necessary, even if the bottle is not filled to the brim you need not necessarily the locking mechanism.
One should use the bottle with water only, I have even though not tested but can well imagine the sticky fluids like fruit juices etc. contaminate the shutter, the shutter can not be ideal clean. Carbonated you may anyway not purely give, also Isostar has worked for me is not ideal to work as the water gushes easily and it therefore comes out top, especially in pockets annoying if you use the bottle completely closes. But if one reduces the amount with the powder by slightly more than half goes quite well.
The worst rating here because of mold I can confirm, has to do with an incorrect cleaning. After you have cleaned the bottle (of course after each use), you should leave the bottle and lid dry separated, especially the cover with the shutter should be open - so do not leave the semi-dry stuff in the cupboard, it must be completely dry before it clears away one else form on plastic sucker small mold spots - this can indeed remove this takes a lot longer cleaning.
Finally, the real reason why I bought this bottle, the cooling function.
This function can confirm I, in my old bottles I had a short time, especially now in the summer only a warm soup. The CamelBak I always have a cool liquid, clear hold this effect does not last forever, but even after 3-4 hours was with me the liquid cool and pleasant to drink, certainly not as cool as the fill (use no ice) but I had no warm soup more like the other bottles.