I used this procedure and found it to be easy and the card worked well. It is worth noting that when you change the Airport card you change the MAC address for your machine. Some licensing schemes use this to activate software and those activations will be lost unless they can be deactivated before you do the card replacement. A couple of examples are iLok (used with Avid digital audio workstation (DAW) software), plugins for many DAWs, GraphPad Prism statistical software, and no doubt many others. Trying to address this to the extent possible before replacing the card would be probably be best. Sometimes tech support can help after the fact, and sometimes not.