Last October I went to the immigration building in Wan Chai to renew e-channel. There was one person in the office and he had only me to deal with. He checked my records + DL FF and I was done in 15 mins. I have a shiny new barcode sticker.
The airport E-channel offices were closed when I got there. I was hoping to avoid wandering around the govt buildings in Wan Chai.
I'm going back next week and arriving at 23:10. I'm very glad that I'll have e-channel for this trip.