Hello! I haven’t tried Live Twitter Polling - my events are generally attended by businesses and corporates. Often my guests are not the ones in charge of updating the social media accounts!
I think live Twitter anything can work well, although in my case, I’m not sure what the benefits would be over software such as Sli.do. Twitter is also obviously open to the public…how would you stop non-attendees voting? I can see that it would be a great way to get interaction and create a buzz in many situations though, festivals, gigs etc.