6 hour window - you're kidding me, right? Absolutely no respect for the customer's time. I submitted a similar complaint while waiting until the last 30 minutes of my 6 hour drop off window - and now I'm in the last hour of my 6 hour pick up window.
In this day and age and there is absolutely no reason a person can't communicate with a driver on an estimated time of delivery.
It's interesting that the cable and phone companies have the reputation for the long windows - but I just dealt with both earlier this week and had a 3 hour service window on one and a 2 hour service window on another. So apparently Azuma Leasing is the only company still spending time in the dark ages where complete and utter disrespect for your customer's time is okay.
Review about: Azuma Leasing Delivery Service.