Do they still honor your time slot even if your late?

Not all. I think there is a grace of 20mins or so. Depending on their mood

They give you a(1hr).grace period..

I think you are still able to go in up to half an hour late.

We were 15 minutes late and they let us in. I guess it depends on the crowd. Even if u r half an hour late they they will still let u in if they r empty otherwise they may stop u.