I only got my order a few hours ago but so far I'm really liking them. Tried them on my 510, Ego, 3.7VT Roughstack and 5 VT PT and wicked well with my atty on all of them. Its going to take some more time to see if they leak but so far no problem showing up. I'm going to order a package of the version 2 now to see how they compare with these version 1's.