I don't like poly batting because my needle does slide through it.
i like a bit of resistance so that i can maneuver my needle. My personal favorite is Quilters Dream Request - it's a thin cotton batting and has minimal shrinkage. My current project is being done for someone else and she bought Cream Rose (?) (bought at Joann's, pink packaging..) It's not bad, it has puffiness that some people like. I don't know what will happen when it is washed - i hope it doesn't shrink alot.