Excellent Product.  I have four small dogs (3 to 6 lbs).  They can't get through it and it's very flexible...I can move it easily, fold it easily, don't have to ruin walls, and it closes off a regular doorway.  

For such small dogs and doorways, I'd love a shorter version with door...a total of three sections with one of the sections being a door.  This could block off hallways and wouldn't be as long.