Don't worry, not only CUPS is PITA. Even one unnamed OS with totally different print service randomly decides that your printer is offline (what? it is live on the network, I can ping it! I can restart it million times and the spooler still tells me, that it is offline.), just to annoy you. The more important that printed document is and the less time there is for you to present it, the higher probability, that you will not be able to print it.