I mtl and dlh. Just received the Protank 4 hoping to use it for both. So far I tried the .5 ohm ceramic coil and had good results. But my old Protank 3 does mtl better. I put the 1.5 coil in and struggle getting the airflow to produce a good mtl hit. Drip tip doesn't feel right for mtl. Otherwise it's a great tank with plenty of choices in coils. I've run the dual coil rba at .3 ohms, threw in the rba from my Nebox just fine for rebuildable 1.5 ohm. If anyone else uses this one, please post your opinion for mtl.