I got loads of atties, clearos, cartos, drippers, genesis, tayfun - and I pretty much only use my Igo-L. I use a simple 3mm ekowool wick with four wraps of 32 kanthal - comes out at 1.8 ohm. - Great vape, and the taste is as good as it gets.
The W now comes with 2 air holes and if you order from kidneypuncher.com you can specify the size air holes you want
I would however like to try the W. I use an Octopus (smok?) with microcoil and cotton, seems OK. I guess all these RDAs work ever so slightly differently with airflow and vape chamber.