We did travel to USA today by flight. The immigration process at Toronto Pearson airport was very smooth. We gave (my daughter and myself) gave closed envelope and our passports. Officer took our photos and finger prints and took us to the secondary room, where we had to wait like 15/20 minutes, same officer called us and confirmed the address where we want to receive the green card. Asked my daughter how old is she ( she is 22) and then stamped our passports and told us the Visa is valid for 1 year and we can travel to and thro' how many times we want until it expires and then send us our way. Whole process was very smooth. Officer was very polite.
Thank you every one for supporting here !! and good luck to all who are waiting !!