A great ending to a great show. The producers were wise enough to let the story end here, however there could be so much more story told...
But since there wasn't enough interest in season 3 anymore, it became unlikely that a 5th one would have ever been produced. All storylines were brought to an appropriate and melancholic ending, I felt like crying and laughing at the same time when the final credits appeared on the screen. What an amazing, surprising and entertaining experience...