This valve is a MUST if you want to save money in the long run.
Looks good
Weaknesses:
A little pricey, but of course, think of all the money you'll save on Co2
It was a b*tch to install. I installed it my self :P
Conclusion:
This is one of the first accesories I bought for my Piranha STS. Caus I knew it would save me alot of money in the long run. This is a must for anyone using Co2.