I would not buy one because
I realize I am probably in the minority here, but I would not get one of these because the hose end and electric connection is very nonstandard. I think there is an adapter that will convert the hose end, but I could not connect all of my other power nozzles to it, I'm the type who likes to use different attachments with mhy different vacuums. If that is not something you do, I have used one and they are very quiet and powerful and seem to clean really well, although you could probably get a canister that cleans just as well for a cheaper price. Or, better yet, for the price you would pay for a Guardian Platinum, get a central vacuum power unit and a central vacuum attachment kit and use it free standing, that will be even more powerful.
Mike