I just finished my noodle insertion session. I still have some inside, but they are the minority. I inserted a dish and a half of noodles inside of me. As they are denser than bananas, I only waited a few minutes with them inside (due to fear that later they would not come out); then expelled everything I could. I think I threw out 85% and the other 15% stayed inside me (I could touch them with my fingers, but I could not pull them out). I did not worry about it. After a couple of hours, I naturally expelled part of what I had inside. I still have a few inside, but they'll be out.
The sensation of fullness is not as intense as with the bananas. Nor did they rub so much the digestive tract on entering, therefore even though I knew they were coming into me (and psychologically it made me horny), physically I hardly felt them (unlike bannas, which in my opinion produce much physical pleasure). Also, since noodles are thicker than bananas and do not turn into liquid, for safety I prefer bananas (since I know bananas come out, no matter how much I insert, how deep I push them in or how long they are there).
What I really liked about noodles is the expulsion phase. When you throw them out, it feels much better and much more intense than bananas. In fact, to those who like to simulate the expulsion of real poop, noodles will like them a lot, since it is practically the same; there's no difference.
In short, it was a good experience. I do not know if I will repeat it, but I enjoyed it and right now i'm very happy.