What does "it's a good start" really mean.
This strikes me as very true, but irrelevant.  As an American I say something positive to every startup founder I encounter, but secretly think they are nuts.  Had I met the founders of these companies, below is what I would have thought:Heroku: Sounds nice but impossible to deliver.  Even if you do, no one is going to trust their business to your startup's  platform.Dropbox:  Yet another backup solution that is going nowhere.AirBnb: Have fun building a marketplace.  Chicken and egg problems are impossible to solve.I have learned to not trust my instincts.  Now I tell startups, "Sounds cool, but why are you at a tech event?  You should be at an event for fashion/teachers/bar owners/tour guides/whoever your customer is.  Why are you clowning around seeking reassurance from from other programmers?"