[gatotom]

put one in during construction of my house over 20 yrs ago and it works great on wood floors and carpeting in the bedrooms. The only hassle with them are the hose length. You don't want a ton of outlets because they lose suction power but you don't want a 50' hose to drag around the house either.

My house measures 40'x30' two stories with a basement, the common wall for my heating and cooling system is real close to the center of house. That is were the vacuum pipes are so one outlet per floor, the less elbows the better and yes get a bigger unit than the salesman says cuz it will never overload and if you have a kid that's cranky, well, vacuum him up and less chance of clogging the line up.