Took a while to get to the US but arrived in about 2.5 weeks pretty good considering it's international. Simple to use, really plug and play. Only issue, minor, was I had to change to a different USB port on same computer. Just Download the "Tool" from link provided. Select comm port and your profile and in about 15 seconds you have a fully programmed Resin Tank. If you get an error on comm port just unplug the USB and reinsert check comm port drop down and select the new one there. Works like a champ. I have reprogrammed the tank about 7 times trying different profiles with different resins, such as Clear with DF Grey to get more detail. Works every time. Takes 15 seconds to reprogram. I am putting about 200 ml in the tank after initially filling the tank. Keeps my printer going all night. You could fill it up if you want. Documentation was good, very simple. Communication with seller has been excellent. LOVE IT! Everything works, heater, wiper, auto fill!