Painfully slow. It's not okay to be slow during the morning rush. The cashiers could get customers through quickly but could not serve quickly.
Communication between the staff seemed lost. The woman at serving counter asked what I ordered 10 mins after I paid. She had to ask someone to get it started, so I'm glad she asked because it seemed as if no one knew I even ordered it.
Not sure if this is what it's like going through the drive-thru but I don't think I'll be returning.