In my personal opinion (and if you read some blog posts and books from people who are in the startup business), the best option is a basic MVP with the most cri

In my personal opinion (and if you read some blog posts and books from people who are in the startup business), the best option is a basic MVP with the most critical idea-related features. This serves to prove your concept. Then, concentrate on marketing it (disregarding that it is not per-fect). And look at how people react. Don't count how many will react, but what their reaction is. This will give you an idea where to polish further.