Last week, I got a refurb MBP 17" high res, matte (also a refurb iPhone a few months back). Couldn't tell if the MBP had ever been touched or not. No problems with it except some backlight bleed on the bottom of the screen, which I take to be not uncommon and hasn't bothered me much.
Now I'm just trying to decide whether I made the right choice in terms of the 17" MBP's large footprint. Despite the 10% restocking fee, I'm toying with exchanging for a 15 MBP or updated MB.
Anyway, I give refurbs a strong thumbs up! Especially if you're not eligible for the education discount.