The sprayer is simple and easy to use. It is plastic and will not corrode over time. One gallon is a good size and can be carried up a ladder and not be too heavy. It is a bit sloppy when dumping the contents into a storage container to save unused liquids from the sprayer. A rinse with water cleans the sprayer and permits long term storage until needed again. You can write on the outside with a felt marker so you won't forget what is inside. Good product.