Like most of my RTAs I change the wick between 30-60ml of juice. The tank has several options with the bundle kit. You can use a 5ml, 10ml, or the huge 20ml.
The bundle has all the necessary glass and chimneys to set it up how you like.
With the 20ml set up there is a bit of loss of flavor but this is off set by only filling it every other day. The 5ml set up has the best flavor but more refilling. The 10ml set up has adequate flavor and I only have to fill it once a day as long as I have 2 mods in rotation. The 10ml is my go to set up.
To be honest 20ml is a rediculous amount of juice in an atty and it is almost as tall as my mod itself.
The thing I like about it the most is the flavor, ease of wicking and coiling. Unless I am doing a complete tank tear down to clean, I can just flip it over and take the coiling section out and wick it in a few minutes.