Pros
What is good about Moss are the people, there are a lot of excellent people working at Moss, just they are not listened to by management. If you manage to stay in long enough and the company will not fail you can grow fast in any position you hold.
Cons
The level of childishness and arrogance coming especially from C-level is completely unrivalled. Professionals are attracted with high salaries and big words but are treated like children in a kinder-garden when it comes to making decision. Success is not defined by comprehensive feedback cycles or actual KPIs, you can get fired for having the wrong shape of nose. (meaning it's random) You either burn everyone around you and eventually yourself or you burn out yourself. Any initiatives to improve broken structures are shrugged off or laughed at by key decision-makers, doing so standing in the way of the company moving forward. Internally a set of values are communicated but not lived by at all by management. To anyone that does wish to join this Start-up, make sure to put on your biggest fake smile you have and fix it and above all learn to say yes to everything.