I assume it changes daily but see my comment above.It was no hassle at all. So no need to stress. I thought it would be awful. It wasnt. And no need to get there at 6am.
Ok. So you get there. There is an information queue ( very short) where they give you your papers to complete....so no need to print off any forms. But if you have or when you've filled in.. there is a second table ( both outside in the foyer near the usual immigration entrance). The second table give you your queue number. A1 or A2 and a number...in a ticket. Then go into immigration and head to A area. They will then tell you to scan the QR code. And wait til your number comes up on the line group. ( a lovely immigration woman showed me cos I've not used before...so they will help).
Then wander around til your number comes up. I was 89...so it moves quick. By the time I got to the area they were past my number ( as others seem to insist on hanging around the crowds). So I just went to the next available window and they did my stamp straight away. Plenty taxis outside too.
Concerns are... dont come....or at least get very up to date local info. Its not fun. Most things are closed now. I know this is a visa site but if you dont need to come then dont.