I laugh when I hear someone say they bought a refurb and it looks like new. I'll bet you never opened it up.
I bought 2 MacBooks a few years back for my kids when they were going to college. I bought 2 new ones from Apple, but one of them was DOA, so when I returned it, I bought a refurb, the same model as the new one, because I bought what everybody was saying about how they are as good as new. 2 years into the ownership, both hard drives failed. Not blaming Apple for that. Hard drives go south without notice, they always do eventually. I'm the kind of person inclined to try and do any kind of repair and can follow instructions, so with posted online instructions, tools and new hard drives in hand, I opened each macbook.
The new one had a lots of little screws to remove the shield, more little screws for other things, and I kept track of where everything went, replaced the drive, and it was beautiful. Inside was clean, wires were properly wrapped and tucked under where they needed to be. I opened the refurb, and more than half the screws weren't even there. There should have been around 30 little screws holding the shield, and I think I remember there being about 6. The inside was kind of messy with things not laid out all that cleanly. I hated putting it back together knowing I didn't have all the screws, but hey, the thing worked, and it looked great.
I've been a Mac user since 1987 (Mac SE), currently have a Mac desktop, Macbook, iPad, iPhone, plus 2 other iPhones, macs and iPads in my household. I don't like saying anything negative about Apple, in fact, I sold my Apple stock a few years ago and it paid for my daughter's expensive wedding. Apple has been good to me, but I won't buy another refurb. I've seen the insides. I'd like to think mine was an isolated experience, but how can I? It's really like buying a used car that looks perfect, but has issues that you can't see.