Since I been using sub ohm tanks, knock on wood, I haven't had any problems with leaking tanks.
It's been around 8 months since I started using them.
So I personally think tanks have come a long way.
If you haven't tried a sub ohm tank check out the Innokin iSub tank.
Now I don't just say that because this is a Innokin thread

but for the price and what you get for the price.
If you never priced any, well some of these tanks can cost $50 and up.
I have seen the colored iSub tanks sale for as low as $12 and the iSub G tank for $20 (G = Glass)
Now in most cases cheaper means, not as good, but this isn't one of them cases.
Another plus is the Coils are at the bottom of the price list too
Now I am not an expert on sub ohm tanks by any stretch of the imagination but I do have 10 sub ohm tanks, 8 different kinds, and the last 2 weeks my iSub G tank is my go to tank.
So I do think I know enough to tell people before they go spending twice as much on something else that the iSub tank is just as good if not better.
I just wanted to mention this for all you winners out there that might have never owned or tried a sub ohm tank and are now in the market for one.