I too gave up on Kanger products before the Aerotank. I had nothing but problems with ALL of them before - too hard to draw, leaking, gurgling, etc... I've now had the Aerotank a few days and I'm really surprised. Adjusting the draw is easy and I've had no issues with gurgling etc. I think the issue with the Protanks was always related to draw; bad draw (for me) made me suck harder which ended up flooding everything inside. Big thumbs up for the Aerotank.