Does anyone have a preference for a manual vacuum head style or brand? I have an automatic pool cleaner but it always misses spots so I am going to get a manual head to get those areas. I see triangle shaped ones, rectangle shapes, some with wheels, some with brushes, some without. I am leaning towards one that is kind of rectangular shaped with some little brushes on the side but I would like to know opinions and pros or cons of the various shapes. Thanks!