I liked the ones from Ikenvape so much I went back and bought 3 different times. They are excellent. The switch on these seem very responsive to me.
I agree they have a very nice responsive switch. I was kind of waiting to see how it was going to hold up before buying more but they are working so good I think I'll pick up a couple of more from this batch. You never know what the next shipment might bring. He was planning to order the next ones without the led and I prefer the led for charging and knowing when it is firing.
And 510 slim auto batteries are notorious for being weak. The "T" batteries sold along the same time were supposed to bring them up to par with the 808s at the time. 3.7v and regulated. I don't know about that though. I still see a lot of 510 slim users making the jump to mods pretty quickly.