I added it for peace of mind. I am glad I did, because by midweek I noticed a small hole in the netting of the basket, and the material on the handlebars was splitting. I don't believe we caused these problems, as the handlebars you could spin the covering to line up the seams and not notice, but I didn't want to get a bill from the rental company for damage, so I am glad we had the insurance.
Never heard anything from the rental company so don't know if they even noticed the problems.