This is a fun way to get around in Copenhagen. With that said, it's not a cheap way to get around.
As locals we most often use these bike taxis to get us to the closest train or metro stations after a long night out, when the feet are tired and we are too drunk to walk. That is unfortunately true.
But for a tourist it’s a fun way to get around. You can even book them to do sightseeing which is a lovely way to see the main attractions on a sunny day.
The bike taxis often have blankets and music so you can even take a tour with a hot chiócolate in winter time.
https://www.rickshaw-copenhagen.com