JOYIN 685cm Triple Slide and 3 Bodyboard Boards, Lawn Water Slides and Sprinkler for Kids Adults, Outdoor Fun in the Garden

Why are the reviews for this item mention about dogs? I would like a relevent review for this item... like the durability and quality

Does this have to be inflated?

Does this have to stick into the grass?

What all comes with this? What do I need to buy extra for this to work and to be put together? Does it come with an air compressor?