Brilliant little tank, had zero issues with leakage, very secure and easy to fill, coil replacement is also super easy and can be done while there's still liquid in the tank. The size is quite narrow so it looks a little out of place on medium to large mods but that's to be expected from an MTL tank. The drip tip acts as a little stopping mechanism for the lid meaning you can't slide it open to refill without taking the tip out. This makes it very secure but also means if you use a third party drip tip you lose this feature and risk the lid potentially sliding open in your pocket, although it still has some resistance.