Experience of reading out loud during preg, listening to clical music, and teaching a baby sign language.?

I am 5 months pregnant and i have been purchasing bedtime books since my 20th week. I read somewhere that it really helps the development of my babys brain in the womb. i am also going to buy some bach and mozart to play in the background. I have also purchased some baby books that show basic sign language and i have started practicing and teaching my bf. I was wondering what the experinence has been for mothers who have done this with their children.