After trying quite a few other brands and products, and being disappointed with them all, I did some online research and checked out some e-cigarette reviews and found that Vype had some very good results. I ordered the eTank Pro and liquids and was so pleased with the user experience, I ordered a second unit and spares so that I could have some better continuity of daily usage. The eTank Pro is a great find for me and an excellent product. The quality of the unit is very high and the top filling makes this device very simple to keep topped up with liquid, with low or no risk of spillage. Michael M