I use mine for adverse weather conditions. Warm and heavy rains or 95 deg hot summer days come to mind.
When I bought it I was actually a bit apprehensive that I might ride it too much, neglect the pedal bike and not get enough exercise. It hasn't turned out that way, though. Though it's a joy to ride, it takes more looking after than a regular bike. Plus it's heavier. As a result I'm finding that I'd just as soon ride my pedal bike unless I expect to encounter weather that makes me want the extra help.