That was actually very irritating! With that set, you can't do back to back recordings at all if they are a minute longer than an hour! I set it to 0 minutes to disable that "feature". Just because they designed a slow buffer does not mean I want to not be able to record a show from 7-8 PM and then another show from 8-9 PM.
Yes, the 722 has two receivers and will handle that single event OK. But, if I want to record 2 shows back to back, then the extra minute required to get all the shows makes it impossible.
Likely a minor issue, but setting expectations here. If you watch a lot of shows back to back and have lot's of conflicts to deal with, you need more recorders from dish to do what TiVo does quite well.