I'm looking to get a couple Protank 2s because I want to be able to build my own coils. Plus, they fit my Innokin VTR. I currently have three iClear 30Ss and they are ok but not great. The top wicks don't always wick right, gurgling, coils don't last me that long, not rebuildable, & don't care for the taste of silica. I also purchased a Kanger T3S around the time i bought my first 30S. Really hated it at first. Not much vapage and flooded and leaked like crazy. Thought it was garbage so I set it aside. One day I got bored and took it apart. Fiddled around with the coil & boom, it started working much better. Next, I built my own coil with 28 gauge Kanthal (1.3 ohm) and added organic cotton. Wow, even better! Now my T3S produces good clouds, zero flooding/leaking, & flavor is much improved. Also, the coil is now very durable & easy to service. I find I can dry fire it if i am careful not to get it too hot (don't want to melt the rubber insulator). Coil cleans up nice and then I just add fresh cotton. The only problem now is I go through more eJuice because it wicks so well. I feel optimistic that I can get a Protank2 to work well with a custom coil. I heard Kanger products gets mixed reviews because their stock coils can be hit or miss. However, I like to tinker with stuff so it doesn't bother me too much. Also, had a bad coil head in one of my 30Ss. I fiddled with that one and ended up making it worse. I think all the manufacturers occassionally ship out sub-par coil assemblies. That is why I like the idea of rebuildable coil heads rather than replaceable coil heads.