I started out using 0.2 ohm coils. I needed more one time and my store was out, so I ordered them on line. When I got them I noticed right away they were different. The band's on these coils were red, black on my previous coils. I looked at the ohms and it said 0.15! So I put the first one in and was blown away! I needed to vape higher I found out, but there was more taste than I had EVER had on any other coil I have ever used! And even vaping at a higher wattage, I dont get hot hits, and my coils last longer, about 3 weeks! My store doesnt carry the 0.15ohms. They only carry the 0.2ohms. So I will be ordering online from here on out. But is my opinion, with the vape I use, the iStick pico S, the 0.15ohm coil is the way to go. And with the super fast shipping I got from perfectvape.com , that is where I will be ordering them from now on too!