I have 4 cats and was babysitting my sisters very large dog for 10 days.  I needed to have gates I can walk through but wouldn't let the cats in or the dogs out.  I bought 3 gates - regular widths and an extra wide - and effectively divided the downstairs of my house in half.  Max the dog had plenty of room to play and move around and my kitties had access to the bedrooms and upstairs.  And when I needed to move from room to room the gates open easily.  I used them while work was being done in the house to keep the kitties contained and again when I babysat my daughter's puppy.  Now my daughter is using the gates because the ones she was using before - the wooden expandable gates, had to be climbed over or adjusted every time someone moved between rooms.  The gates can be installed temporarily or more permanently and easily adjust with expansion attachments to fit many size openings.  These gates were the most useful items I've bought in a long time.