When you go down to sub-ohm, the vape is warmer, and IMO, harsh. Nicotine is absorbed faster as it gets hotter, so you MUST lower your nicotine by 50-75% when you drop to the lower Ohm coils. For you to move from 1.5 to 0.5, that's a 67% drop, so I'd lower nicotine by at least that much, if not 75% (go to 0-Nic or cut your juice to 1.5 Nicotine)!! You'll also want to change your juice ratio to higher VG content... 50/50 mixes are a good option, and the Kanger coils can handle 30/70 PG/VG without much problems or dry hits. The only way you'll know if you like sub-ohm is to try it, but be aware of the Nicotine and VG requirements, as well as the fact that sub-ohming burn juice faster, hotter, and will deplete your battery faster, too.