Firstly, its light and cordless. So you can take it anywhere in you house and u don't have to worry about a power point. You charge it by mounting the charging point onto a wall near a power point. It has four different heads for different uses and you can also detach the long blue tube part so that you can vacuum your sofa very easily.
I vacuum my floor with this before I mop and it makes it so much cleaner because it picks up the really fine non visible particles from the floor.
There is also an add on allergen kit which helps pick up any fine fur or dust mites. You can also vacuum your mattress with this.
I have also used it to clean my car and I'm amazed at how much it can pick up.
Its definitely worth investing in a top quality household product that you will keep and use for many years. I have friends who have had Dyson vacuum cleaners for as long as they can remember !