Good and sturdy. The only thing that I noticed was my Boge XL cartos do not fit unless you run the tank upside down with the area for the flanged carto at the top. No biggie because that recess actually makes a nice little area that the drip tip fits down in. The silver finish on them is a little lacking, but I wrapped mine and problem solved. Overall I think this a very nice tank for the price, plus it holds almost 6ml of juice.