IMHO, the mephisto is a good "middle weight" (despite its size) RDA - decent flavour and quite good vapor, not extreme with either factor. The afc is functional, and dialling it down with get you best flavour results while opening it up all the way favours clouds - the difference is noticeable.
Your vaping preferences will be a factor. If you like intense, cloud producing direct lung inhales, the mephisto is up to that but not as capable as, say, an Odin or Dark Horse (again, IMHO). If MTL vaping is more your style, it's good for the more aggressive style of that. Some folks really dig the mephisto - I'm currently rocking one with one of my 3 ADV's, air flow 3/4 open.
As for builds, a nice dual coil setup seems to be its native state. I'm running 28 gauge 5/64" netting .55ohms, wicked with Koh Gen Doh. The thing to watch is that the atty has huge post holes and 28 gauge is about as small a wire as you could run without having difficulties capturing it. It would definitely be easier with 26 or 24 gauge wire.
Congrats on the pick up and welcome to the 'Ville
