This Chapin sprayer is as easy to use as it is affordable.  The pressure pump works well, no leakage, and you don't have to lock it down.  It is not to heavy when full to hoId without needing a shoulder strap. I use it along with my new Hoover shampooer on the low-pile carpet, because the Hoover's water dispenser makes it too wet.  After regular vacuuming I turn the Chapin sprayer to a mist setting and use diluted carpet cleaning liquids to moisten sections of carpet.  After a few minutes I suction it up with the Hoover.  This way the carpet is dry in a few minutes instead of a few hours, and I can do the whole house in one day.