I love my protanks. The first one I got in the mail I don't think was fused together right as a little juice would dribble from the top where the glass met the metal mouth piece - myvaporstore.com sent me a new one though
The airy draw took a little getting used to, and I was shocked but it does have amazing vapor production. Just plumes of vapor! Flavor is really great in it too.
You can lessen the airy draw either with an air flow controller (I have not tried, just read about them) or you can use a evod bcc atomizer head instead of the protank one to lessen the airy draw.
After doing that though, I switched back to te protank head - I don't mind the airy draw because that great vapor production is worth it!
I'm not sure, but I also think the fact that the mouthpiece is metal makes for a cooler vape - a plus for me.
All in all, I'm very pleased with the two protanks I have currently. Definitely worth it.