Sometimes, sign-in could be denied
During 11 days of use, I was denied to sign-in twice. Once was in London for activation, another was in Liverpool. Both of them, reason was "wrong password" (actually, it was indicated in Japanese, so "wrong password" could be different in English). I checked it each time and turned out the passwords were right actually. So I tried to reset the "wrong password", but I was denied as my mail address was wrong! I was so disappointed.