Modal Survey provides a user-friendly interface on your WordPress admin to create simple surveys or complex polls.
There are several sample surveys integrated on the create new survey screen, that helps you to install directly and see how does it works through the sample.

Adding questions, different type of answers are easy and if your even have some troubles, you can find a detailed guide in the documentation. In case you still have any difficulties, you can get an email support to show you the right direction.
The plugin working well on thousands of websites, so you can be sure you will get a professional software with dedicated support.

See how easy to create a survey with the plugin: