Had to upgrade my MBP HD from 160GB to 1TB.
Perfect. The hardware upgrade took less than 30 minutes (thank you iFixit for the manual and the tools :-) and, as expected, the software/content took....ahem forever.
Take your time and get a white sheet of paper for the screws. As you disassemble your laptop, place the screws in labelled areas with the step number. This makes the re-assembly procedure seamless.