Bought 24, 18 arrived intact.
Set 18, 15 were fertile, 10 hatched, 3 were dead-in-shell and 2 had died early.
The eggs were not quite as regular in size and shape as I might have like, having said that the smallest egg hatched - go figure.
This is about the best time of year to mail eggs as they are unlikely to get too warm in transit.
The biggest unknown is the quality of handling by the USPS. It varies from excellent to appalling.
I would buy again.