It's easy to use, and it works as advertised. If you have a lot of Twitter followers, you can use it to start getting results very quickly. My little test poll got about a dozen replies in 20 seconds, which was great.
But we're talking about Twitter, a medium that specializes in the fleeting. After the first batch of votes, my poll post must have rolled off my followers' pages, and polling replies slowed to a trickle.
For quick polls where you don't need a statistically reliable response, nor much feedback after the first few minutes, this is a fun, little tool.