Did you actually ask for a refund, or did you just open a returns case? If the latter, then you will get a like for like replacement, probably a re-furb. These are usually fine, so I wouldn't worry about that side of things. As far as time goes, Apple turn replacements around pretty fast normally...Within a week is my experience...But a re-fund will probably take longer as they will have to inspect the Mac and test things out.Thanks for the reply. Just wondering how it work when you return by courier and what the process is.