Joyetech ego AIO with some tobacco flavoured liquid without nicotine. It tasted really bad. I vaped for 2-3 hours and then went back to cigarettes. Although the setup didn't work for me but I saw the potential to help me quit smoking.
Then I did some research and decided to go all-in - bought the best MTL tanks that people suggested (Nautilus, Kabuki), couple of mods (Pico, Tarot nano) and some NET liquid (Black Note, RedVape Havano Gold). I quit smoking 1 week after my Kabuki was setup with Quartet 12mg liquid.