We received our biometrics letter on 7/8! Seems so quick since we got the NOA hardcopies earlier that week (Especially considering our K1 process took a year). So thankful this is moving faster!
The appointment is scheduled for 7/22 but we're going to try to walk-in this week since the USCIS center is only 20 minutes from where we live.
I know there are a few Raleigh-Durham, NC filers on this thread so I'll let you know how the walk-in goes!