Wanted mooooar space and faster.
Repair was fine, got the kit with tools. Everything took about a few mins to exchange out.
Carbon copy didn't work out for me as some on Google search suggested. What did work? Just format the drive the same as our original, and then name it. Then reboot into disk utility mode which is like cmd r or something (Google it heh). Then do a restore from original disk to new disk. I had 430gb to copy so it was an overnight process. However when it does that it also takes the same name. Shut it off then take out original HD and boot into new one. Name that HDssd or whatever, then shut down and add original drive back in. Now when you boot up it may want to boot from original, which is fine. Go to disk utility and then boot up options whatever it's called and select the HDssd or whatever you called it and then when you restart you'll boot into it. Then you can format your other drive for more space.
I put 500gb ssd for primary and my original 500gb hd in optical bay. Then I have a bash script that copies my working directory (for git etc) to both drives. Just in case :) - nick