I have 3.  With senior dogs they are a life saver.  They are low enough that they step over easily but my dogs don't even try.  My house lacks door between rooms to give that open feel. But since they can be adjusted for odd size spaces they work in every situaltion.  They also look very nice like a nice piece of wood furniture.  I have one between the dinning room and family room and it doesn't destract from the formal dining room.  They are very adjustable and easy to open when I want to let a pup through.