This is the best for what I needed to keep the dogs in their room.  It works great and was easy to install.  We were missing some of the hardware, but we used some of our innovations to make this work for our 74 ft. opening.  All the other products that I ordered although they stated that they were large enough they did not fit this large opening between the sunroom and the rest of the house.  I like the fact that the unit is also flexible.  Just wish the door was a little bigger for our large dogs.