Seemed faulty at first,
Verified Purchase(What is this?)
This review is from: Battle.Net Authenticator (PC CD) (CD-ROM)
The authenticator arrived the day after I ordered it so that was a pleasant surprise! However, it didn't sync with my Battle.Net account as expected and it took me almost two days before Blizzard Customer Support could help me set things up properly.
Now the authenticator works just as it should (SO glad I got one!) but the fact that it seemed faulty at first really put me off.
Otherwise: great price, quick delivery!