The library has so many tools available in it which can be used by anyone who wants some specific functionality like sentiment analysis or topic identification etc., I have been using this tool since last 5 years now from different angles but never found any issue related to its use hence no comment here at all! It's one great piece among various other pieces you need when trying something new out there. If your problems are solved then don't worry about anything else because if we try solving those things firstly than what comes next?