Adjustment of Status - I-485

Hi everyone,I had an interview yesterday at Federal Plaza in NYC. The interview was at 2:10 pm and we arrived 30 mins earlier. We have waited to be called almost 2 hours. The interview took around 40 mins. The questions were easy, how we met, when we met, parent names, she checked our wedding album and she really liked it. We also had a separate mixed photo album. We have been dating since 2009 before we got married and she saw our young pictures and made some jokes. She asked me how my husband commutes to work and how long it takes from home. Another question was where he was working when we met. She asked some questions about me to my husband regarding my work and also my parent names. She picked some pictures with friends and families and asked each of their names. She took 4-5 pictures from the album for the file. She was very happy with us, she said we are very organized and everything looks great. We submitted a lot of documents (joint insurances, joint tax returns, lease for last year and updated lease for this year, utilities,honeymoon hotel receipts and plane tickets, furniture receipts, joint bank accounts, phone conversation print outs, etc) We are also going to Maldives this September and we showed our purchased plane tickets and booked hotel receipt. We also gave one copies of them to her. She said we are so lucky and she is jealous by making fun:) At the end she asked me yes/no questions. But the thing is she didn't approve us on spot, instead she gave us a paper saying the decision will be taken in 120 days. I'm not sure how long we will wait. Please share your comments if you have the same experience. Thank you.