This is one of the most difficult and buggy apps/systems I've ever used. Many times it tells me the "printer door is open," and it doesn't print even though it's definitely closed. Sometimes it prints if I email something to the printer, but it only works about half the time. The printer keeps disconnecting somehow and I have to keep "installing" it. The worst part is my printer has been out of black ink for a while, but it still shows I have full ink! And I cannot find a way to request ink :(