Hello, I have about exhausted all avenues of inkjet printer research and and have been reading this forum long before joining. I have a horrid HP C309a printer, and was about to toss it when I found the MIS /Inksupply.com products by chance. I had been reading stuff on the luminous landscape website and saw references to MIS inks, and their grey scale inks. I figured it was a reputable supplier. Finding what looked like the perfect solution to replace my HP564 cartridges and or a CIS for my model, I went and ordered a set of their refillable carts and ink. Things went well the first day, and was amazed to print a perfect photo after GIMPing some colors and levels, and shut down for the day. The next day colors looked bad, and on opening the unit, I found black ink had reverse filled the yellow cart, magenta looked like it was taking a tour, etc. I tried many fixes including letting each cart rest overnight, with exact same levels in each (in case a higher filled cart would siphon into another cart), and so on. I filed a ticket with MIS (now renamed inksupply.com) and they didnt get back to me until I left a message about wanting a refund. The customer support said to mail her some photos of the carts, which I did before the holidays. So far I have heard nothing, and was awaiting holiday delay or excuse. Black and mixed colors hang off the head, and I think they are backing up into the wrong channels. Has anyone had problems with their ink being too thin, or their cart sponges wrong, etc? My puke and wipe station is completely cleaned out, and I attached a colostomy hose and bottle to the pump outlet, and ink flows readily when cleaning heads. (HP must still believe in bleeding of patients to cure them). Learned a lot more about inkjet defective by design thanks to your forum, and hope to find a non-hp printer/ink system if this doesnt work out.