Yes, Twitter is good for use, because twitter is the best source of traffic. One of the best parts of using twitter is that you can connect with a client or a reader.
Yes, it does good to me, in my personal life. One of my ways to keep in touch with my family and friends
Twitter is good if you can profit off of it or advertise on it, of course. Other than that, it can waste time. Twitter, like most other tools, can be good or bad depending on how it's used.
Right now I'm dealing with almost 100 followers, I have to say that its not my main source for traffic. Have had better luck with Youtube than any of the social networking sites like Facebook & Twitter.
Twitter is not really a good source of traffic. It is very limited to your followers. If you have few followers, then, it can only give you a few traffic to none.