I didn't like my mini Protank3 at all. For me, it was way too airy, didn't give me much flavor, and both the atomizer coil and mouthpiece got way too hot, way too fast. I took it back in a few days. My B&M switched it out for an EVOD 2. That one was pretty nice, but I was going through coils every other day. Those two products were worse than the cheap plastic clearomizers I had bought from the gas station. I ended up getting an Aspire ET-BVC, and love it. It is styled like the EVOD 2, but holds more and carries flavor so much better.
I haven't enjoyed my Kangertech products, nor have I liked their coils in my husband's Davide, but they get so many high reviews, I can't help but wonder if I just haven't found the right Kanger for me. Personally, I'm on the Aspire camp.
But, I second the recommendation to get an AeroTank instead of a ProTank 2 or 3. The airflow adjustment might just be the key to getting a satisfying vape out of those coils. It'll probably do you better in the long run.