I took a ParisCharmsandSecrets electric bike tour with my then 15 year old daughter in 2007. I had not ridden a bike in 20 or more years and my daughter was not an experienced rider as we lived in the country at the time on a gravel road.
We both enjoyed the tour immensely. We were very lucky in that the guide was a charming and knowledgable lifelong Parisian and there was only 1 other person in our group. We set off from Place Vendome, went as far east as the Arenes de Lutece and as far west as the Eiffel Tower. We were able to enter 2 places that required a key which supposedly only the company had access to. We would not have got in on our own in other words. The routes were well planned to keep us out of potentially dangerous traffic.
I was amazed that after 4 hours I could have done it again. The electric assist was that good. I've been meaning to do another tour with my wife, but on subsequent visits just haven't seemed to have had the time. Next trip!