The problem I see with "refurbished" units not sold by Apple is that you don't know who refurbed them. If you buy the refurb directly for Apple you are assured of its provenance and quality, and there are no warranty issues down the road. As long as you are in the US it makes no sense to buy an alleged refurb from anyone else. Apple ships computers free so there is no reason other than a short wait while it ships. Our refurrbs get fgrom California to the wilds of Idaho in about three days.
Here is the official Apple refurb Store page featuring MacBook Pros:
http://www.apple.com/shop/browse/home/specialdeals/mac/macbook_pro
Every model is clearly identified with the release date so you know exactly what you are getting, something that is seldom obvious with "refurbs" offered by non-Apple sellers. The selection on the refurb site changes fast so, if you don't see what you want, check back in a couple of hours. When was looking for a particular refurb unit, it had been on the site for several weeks. When I got ready to buy, it was gone. An hour later it was back and I ordered it.
I am typing this at a refurb iMac that saved me close to US$700 over the "new" price and it has given four years of flawless service. From my chair in our home office I can see two more Macs, two iPads, and a Airport Extreme Base Station, all bought directly from Apple as refurbs. All have been excellent values.