Grade: A- Wonderful tank for holding juice, for the most part. Two downsides. Both downsides may be my fault, as I’m new to vaping and still learning. It kind of leaks. I took it into the store where I got it and they messed around with it, so it leaks a lot less, but still a little bit. If you fill it all the way up, it gets a burnt taste. Easy fix: don’t fill too much! But if I want it to last me the whole day, I want to be able to fill it up more. Even with the above drawbacks, I love this tank and will purchase it again.