I had an interesting experience at the Boston field office today. I filed my I-751/ ROC in early May (VSC) and got the first NOA last week. Today I had an infopass appointment to ask about my biometrics. I'll be traveling abroad for four months starting the end of June, and I was worried that I'd miss my notice/the appointment/lose status/the world would end. The guy I spoke to looked at my NOA for a long time, then at his computer, then he talked to his supervisor, and then he told me that I should go ahead and travel, because my biometrics wouldn't be scheduled for another couple of months. And even if I miss the appointment, I could just go when I get back to the country, he said, and I shouldn't worry about getting back into the States because I have my NOA extending my green card.
It's not what I expected to hear, and it kinda contradicts a lot of the things I'd read about the ROC process, but I guess I'll trust him, and stop worrying so much about getting my biometrics notice before I leave.
Sharing this here as a data point. I might still call the info line and ask a tier 2 person to confirm this for me next week... Has anyone had a similar experience?
Good luck to everyone!