i didn't have cracked hinges, but i did have a non-clicky R button.
they charge your credit card $5 and ship out a ds really fast (took like 2 days to arrive to ohio). you send back in your broken ds in the box and they won't charge your credit card $120 something.
my ds i got from them was marked as a refurb, but honestly i couldn't find any evidence of that. i couldn't even find a fingerprint or scratch or dead pixel or any dirt or dust anywhere. who knows