Vanmoof have had a bit of an up and down and up reputation. It was really good for a while but recently seemed to have become more problematic. A local bikeshare group who have a few hundred aren't as happy as they could be with them at the moment. There are rumors that they're working hard to improve things.
A better option for comfort, reliability, and pedal efficiency might be something from Workcycles:
City Bikes | LocalMile