Pros
Marcus had a belief in his product. Unfortunately, that was the only thing.
Cons
We worked with Marcus on his project last year. Our task was the development of a mobile application, design, and also providing the presentation of the project at WebSummit (a large conference of startups and investments). As a result, Mr.Dold did not pay a dime for the developed project, providing a payment obligation during the conference (referring that we will be paid upon returning home), and after - started to ignore all the messages and requests from our company. Moreover, we found six more people with whom Marcus equally also did not pay for the services provided. Conclusion: appearance is deceiving. A seemingly serious and wise businessman does not hesitate to deceive people and build his company in this way. I am writing this comment as a warning to those who are likely to work with him further. I hope it will be a warning to others.