I definitely like Berlin - considered living there for a year (I speak German which makes it easier). It is a city of experiments, both good and bad, full of great art, and a very active night-life scene.
Consider the similar phrase, "Did you eat good pie", versus "Did you eat pie well". In the pie case the former is correct because you're referring to the quality of the pie. In the case at hand, we're talking about the quality of the speaking.
In short: working in the startup scene won't be a problem; grocery shopping might be an adventure. ;-)