No!!
i bought one (imac 24inch 3.06) and they have made such a fuss about fixing it in store.
still has problems now after being repaired a few times.
i even had to send it to a 3rd party repair center because the mac store in southampton wouldn't fix it!
Sound like a problem with the store, not the refurb product.
I've bought a Mac Mini, my mother's 2010 iMac, 2
TV (gen 1), a first gen iPhone, 2 iPod Touches and ton's of accessories and have had no more issues than with any of my new equipment. Any issues I did have were completely resolved or the product was replaced immediately at my local Apple store. I won't buy anything but refurbs going forward considering the savings.