I have bought a couple authentics lately and absolutely love them. I never have to worry about anything when using them. Have zero issues and they hit harder then anything I have ever owned... I have the shotgun by emit paired with the Apollo by emit, flagship paired with ceo, and a Tantra by chillum.
I'm using my IPV v2 and I stay at 36.5w on a .4 single coil. This thing at 36.5w and a single coil is putting out clouds equivalent to my .12 dual coil on my mech. I love this dam device..
I also have the cloupor t5 but it's still sitting in the box just cause I been loving my IPV. I might update the firmware on the t5 so it can hit 75w (granted it doesn't break my device in the process)
I went out and bought a chuff (I think that's what they are called) top for my shotgun mod and Apollo. Also picked up some Pima cotton... Its just organic, all natural, fresh from the farm, but it's super fine, and has straight long fibers, almost like hair.
I have noticed my builds have gradually decreased in resistance over the past few month... I use to not be able to go lower then about a .3 but preferred to sit about .5.. Now my builds are all below .2 I tend to stay about .14 or .12 now, anything higher and I don't feel like I'm getting anything.
I have mixed emotions with mine. I had the same problem with finding the sweet spot, but after buying an authentic flagship and emit shotgun I haven't had any issue with them... Other then They die super fast in comparison to my MXJO's
I moved up very quick, but it took my wife almost a year. If it isn't as much a hobby as a healthier alternative, then there is no need to move up. If your satisfied with the ego or pen style then rock it! Anything is better then going back to the stinkies.