I've gone through a lot of cans in the last 20 years, and this one is, no question, the best.
First note - make absolutely sure you tighten the black collar even more than you've ever had to tighten any other one, because if you don't you'll end up with gas all over like I did. ;)
But once it's cranked down, it works wonderfully.
No gas comes out at all till you push the button, and then it comes out in a great steady stream, no glub glub surges as it transfers air for gas inside the can.
Let go of the button (which is not hard to depress by the way, very smooth action) and gas cuts off, instantly.
The plastic of the can is much sturdier and more solid than the others I've had, seems thicker and better made.
I'm glad I finally got to throw away my nasty 5 gallon beast I've had for the last few years.