Enigma Cryptology

Could someone more familiar with cryptology than I
am provide an example of how good the Enigma was by modern digital
cryptology standards? How difficult would it be for current deciphering
software and hardware to decode an Enigma message? Assume one of the
more advanced WWII machines, such as a late-model Naval device, using
the standard procedures. (Enciphered leading key for one setting, short
message, etc.) Also assume that the person deciphering the message
wouldn't know how it had been encrypted, but was starting blind with the
letter sequence of an entire short message.

We have more number crunchiness, but did their cleverness make up for that?