Alayne C.wrote a review of Platypus Shut Off Valve on October 12, 2015
Familiarity: I've used it several times
The bit valve on my Platypus was always leaking or dripping, so I purchased this valve. It completely fixed the leaking problem, and overall I’m happy with it. My only complaint is that I found it a bit difficult to open and close. There isn't really anything to grab onto in order to twist it open, and I feel like it would be even harder to use in winter with gloves on. Also, with the valve on, I can’t easily fit the hose through the space in my hydration pack. Not having the hose dripping is worth it, but it’s not a perfect solution.