This plugin will allow you to set up polls quickly, add questions and start collecting answers. There's a good chance it will work out of the box, and while there are a lot of options setting up a poll isn't too confusing. If you just want to get polls on your site quickly, this may be the plugin for you.
If you're looking for something that can fit seamlessly in to your site and give you the polls functionality without bloat or errors, I would look elsewhere. Both the core php code and the html/css output have problems, and it's hard to work around these without changes to the core plugin code.
There are many options, but rather than adding flexibility, many of them are working around problems and limitations with the way the plugin works.
I am still using this plugin, it has a lot of good features. It's free and it will do the job. However, I don't intend to keep using it long-term and in hindsight I think the time I've put in to it could have been better spent elsewhere.