It was so easy to open up and clip to stay open.  My cat is 20 pounds and fits just right in the stroller
  At first she was scared, but I live in a 11 story building for seniors and they enjoyed seeing her.  She was always cooped up in the apartment and it only took her about 5 min to get used to riding and with the screen so big she could see everyone.  When the weather gets warmer, I have COPD and I need exercise to strengthen my lungs and I plan on taking her for walks.  I think we both will enjoy that.