I don't think I was unlucky. I had the same sort of problems that other users I know had. The RF on the phone is horrible. I tried to use it often overseas and would continually get calls dropped or unable to connect to a network while a guy on a Nokia next to me was jabbering away. Not to mention the numerous times in the States when I could barely pick up a signal.
Aside from that the features were great but if you can't use the phone to send and receive calls reliably then it isn't worth much in my book. The S55 has performed like a champ in the RF area and it has all the bells and whistles of the SE T68i.