I got the HP 5740 free after rebate with my Powerbook. The black cartridge works ok... However, the color cartridge only works just after a cleaning. After that it appears clogged. So... I went to Best Buy and bought a new cartridge. Guess what? Still have the same problem. So... Saturday, I get to make the 3rd trip to the Apple Store to exchange the lousy printer. Nothing like wasting a Saturday. Maybe I'll at least get to play with a new 20" iMac. I've already seen the 17".