PollyMolly

Reporting back with good news, I passed the test and have my oath scheduled for Friday!
Even though I have/had my i751 pending (my wife came with me), they made no reference to it at all (some people I know are interviewed then and there for it as well by a different officer.)
 
The interview was very straightforward, as soon as I sat down he asked to see my green card, and then just had me read a sentence, write down a sentence, and asked the civics questions (If President and Vice-president can't serve then who becomes president? How many years do we choose a senator for? What did the declaration of independence do? Name one branch of government? What does the president's cabinet do? How many justices are in the Supreme Court?)
I then swore I was telling the truth and briefly went over answers in the n400 application, was asked to check all my details for the oath, and had me sit outside while someone would call me with the date and time for the ceremony. It was about a 30 minute wait, meanwhile I received like 8 text message alerts and emails about updates on my USCIS account. 
 
Now I just need to go back Friday for the oath to the same office! Best of luck to everyone!
 
 

I just got a letter from USCIS that for unforeseen circumstances they canceled my interview for my citizenship.
I just can’t believe it.
it’s been almost 21 months My 10 year gc is pending and now they canceled my interview and I’m not sure when they will schedule the next time.
 

Sorry to hear, @PollyMolly, my interview was descheduled too and it's very disheartening. I hope you get a reschedule real soon!

WOW, incredible... Sorry to hear that. Hope they reschedule it ASAP

I'm not sure if I misunderstood what you meant with that link. I didn't see that person had I751 interview at all.
But to me as the letter says it's the interview for my N400 and I'm going for that even though my I751 is still pending. 
To be honest I don't care about my I751 at this moment, because when I get my citizenship I don't need my green card.
I will share more details after my interview and I hope you will have a great interview as well.
 

No difference at all.  Except the ones mailed out come with a cover letter basically explaining what it is they've mailed you (your name, your address, what year it is reflecting---all info already on the transcripts themselves).  I took the printed ones to my  interview and kept the mailed ones for my own records.