Advance Parole

I would like to share my experience with Advance Parole Travel Document.
I'm waiting for a decision on my I-485 over 2 years and decided to request the Travel Document to visit my mother in Brazil which was in the hospital. I did request it in begging of October 2013. Got it on my mail after 2 weeks. I traveled to Brazil and spent 2 weeks there on November 2013. I was a little bit worried about re entry USA. I went to the Visitors line at JFK Airport. It was fast. I was called. Gave my passport and the 2 identical letter (Travel Document - Advance Parole). The officer was very nice and trying some words in Portuguese with me. He asked me how many days I stayed in Brazil and I said 2 weeks. also asked me why I still don't have my Green Card and I said because I'm still waiting for a decision. Then took my finger prints and brought me to a separate room. Left my documents and I there. There was 2 more people waiting and 2 officers to take care of us. Then one officer (woman) got my papers and started to look some informations on her computer....I could see everything but she did not call me. It took about 10 minutes. she stood up, walked to the next booth, got an stamp and stamped my passport and one of my Travel Document letter. She did not ask me anything, not even a question. Then called me, gave back my passport and letter and said: Welcome Back!
I was not too nervous because before leaving the USA I read a lot about this Travel Document and I was less scared of returning. But, leaving the country with my I-485 pending might bring me some difficult in the future to get my Green Card. Immigration can put on the table why I left the country without the Green Card. Anyway everything went smooth and I'm planning on my next trip to Brazil to visit my sick mother! Hope this post help everyone with the same doubts I had before traveling abroad. Good luck guys and there is no need to be scared of leaving and coming back.