I like to use the Magnetic Lasso Tool. Great for complex edges. You have to tweak the width, edge contrast and frequency. After you make your selection, right click and do a Select Inverse and delete background or right click and do a Layer Via Copy. If you do the Layer Via Copy, you can lower the opacity of the original layer to see if you got everything you wanted. The Extract doesn't work very well. It does leave bits and pieces all over the place.