It's fairly easy to use, subject to the limitations of the Twitter API. I was able to hack a script that interfaced with it quickly.
My only grumble is that it doesn't support proxies, but I can get by without that.
A rather shallow and infrequently updated access to Twitter. Lots of Twitter API calls missing; and no protocol to specify what these might be. Lots of errors with get_error and its ridiculous return values (sometimes returns hashref, arrayref, scalar, etc). Overall, it's much better to implement your own Twitter calls with LWP then relying on this outdated module. I made a big mistake using this in my script, and it has caused hours and hours of headaches to get rid of it.