When I first saw the ISS I couldn't believe how bright it is and how fast it moves.
Yeah...my most memorable sighting lasted six minutes on a cold, clear winter night in Northern Canada. I could actually see the shape of it as it passed - it wasn't just a light in the sky. I tried to use binoculars but was unsuccessful - that sighting happened when repairs were being done to the outside of the ISS and I wanted to see the guys hanging out there. But, I didn't see anybody - way too hard to do with binoculars.