After a day with the Smok Magneto I arrived at the following:
The bottom button was rough, noisy, and sticky from the start. I was told to tighten the locking ring in the button section, and that helped for a bit, but not for long. It got rough and sticky again and I got misfires.
I was advised to use Noalox on the button, so I went to Home Depot and got some. I put it on the friction areas of the button with a Q-tip after taking that apart, and the threads of the tubes and cap.
It did not help at all with the button. It was still sticky, and misfired too often for my liking in a new mech. The threading on the center tube is not up to snuff either, loose and imprecise. I don't like the button on the Magneto at all. I've gone back to my Sigelei 24, which I was having button issues with from time to time, but not as bad as with the Magneto.
For all the online hype about this mech, and it's initial popularity, I cannot see it justified in the product, and will probably just put it on craigslist for what I paid for it. Probably someone will care more about the spider on the button, the 1939 on it and the hype about it than I do. I just want a mech that works right. They could have done a much better job on the button.
That the button uses magnets is no substitute for good machining and tolerances, both of which I find lacking in the Magneto. The button locking ring I find to be of little utility. I can sit my Sigelei 24 down without that and it stands there just fine, which is nice. The Magneto, while you can sit it down with an RBA on it and not have it fire, is still unstable and will fall over quite easily, rocking around on it's magnetic button, unless you use the locking ring... every vape you take. Too much bother for me.
I don't have to do that with my Sigelei 24, I can just set it down and it stands there just fine, and it comes with a collar and D-ring I can use in my car with a lanyard to vape on the go. When driving a stick shift that's nice.
I'm sure there are some who are happy with the Magneto, but it's just not for me. I don't like the button at all. It's sticky and rough, misfires, and I don't like it.