This unit is probably find for a standard doorway.  We bought this because we have a wide opening between kitchen and family room where we would like to keep our dog away from.  We bought the main gate plus the 11 inch, 6 inch and 3 inch extension.  The problem is with all 3 extensions put together plus the gate, its not sturdy.  It buckles at the weak point.  I really wanted to like this.  Again if you have a standard width opening and you don't need an extension its probably fine