I really agree with them .Disposable can use too short .Even though sometimes it is more convenient and seems cheap .But in the long term it will waste a lot of money . May be ego is good to start with .
I want to say i am a noobie too .But i have heard something about this kind of question .I think ego-T is a nice mod of e cig and has learned a good reputation in the customer .when you feel the burning taste or the vapor lessens or the cart is empty then it should be refilled.If I make any mistake i am so sorry.