Twitter. For me it sums up the whole Internet discussion. What pros and cons !
Pros : quick communication of news. Headlines sent out swiftly. Photos. Link it with Facebook and you're sharing something quickly and easily.
Cons : strange tweets in your name advertising products you've never heard of. Ty to change your password - Byzantine complexity. And then there's all the tweets ! It's by far the biggest time-waster on the Internet !
So if you see strange updates from me advertising bizarre herbal products - it's not me, and I am working on sorting it out...