I am rather surprised with your "leap of faith" in the Sentiment Analysis tools mentioned. Sentiment Analysis and Opinion Mining has garnered a lot of research interest around the world and it's still a problem more so for noisy (SMS/chat style) text. If your system is relying heavily on such a tool, I would suggest to go back to the drawing board and make an evaluation.

I am rather surprised with your "leap of faith" in the Sentiment Analysis tools mentioned. Sentiment Analysis and Opinion Mining has garnered a lot of research interest around the world and it's still a problem an "open" problem, more so for noisy (SMS/chat style) text. If your system is relying heavily on such a tool, I would suggest to go back to the drawing board and make an evaluation.evaluation of the "off the shelf tool" which you are planning to use.