Thanks for all the reply's I wanted to post a followup on the vivi nova. I am still not 100% sure if I have the 2.5 or the 2.0 version. After the help of several youtube videos I recoiled and shortened the wick in my 2.8ohm head. After doing that and using a thinner ejuice it is vaping pretty well. It is reliable in that it does not leak. I can carry it around with me all day and not worry - however I do notice a dry harsh hit in comparision to my other tank. And also muted flavor. The weird thing is I kinda like the harsh hits as it feels to me more like real smoke but I does get a little old. Gonna order some new heads and see if the flavor gets better and smoother but other than that it is a solid tank.