We prepared the N400 and submitted it the same day it opened since it will arrive 3days later to. It took 6 months to complete the whole process of N400.
Just completed this journey yesterday. Applied April 28, 2021 for ROC. Got N400 interview yesterday and passed it and took the Oath same day. I-751 still pending and was told that there is a problem with Microsoft system, no idea what it means but finally it’s over and both get approved.