Well you used the word detail and made it sound like you could make out features naked eye on the ISS. That simply isn't possible with the naked eye. Like I have said I even tried with 9X63 binoculars and it was still a pinpoint. Figuring the human eye has a angular resolution of about 1 minute of arc and the ISS is around 40 to 50 arc seconds in angular diameter on average, its gonna be very difficult to see any kind of detail. Adding to difficulty, the ISS is very bright when close and the glare off the solar panels would also make it difficult.
As long as you enjoyed watching it zoom overhead is all that counts though I guess.