Thanks Stefano,
I’m happy to describe my first impressions and difficulties experienced.
The first thing I did was go to the first tab, Welcome & Support, to read about how to set it up. The First Step says:
Newsletter works out of box. You don’t need to create lists or evenly configure it. Just use your WordPress appearance panel, enter the widgets panel and ass (typo) the Newsletter widget.
The spelling error in the first step raised a bit of a red flag, making me wonder if the rest of the documentation was going to lack attention to detail.
I added the widget to my sidebar but all I got was a small round grey image. I wasn’t sure if I had missed something in the very basic instructions so I went and read the first step again. I wondered again about the lack of attention to detail and thought perhaps you had accidentally omitted some of the instructions.
I then went back to the widget and read the details on the widget:
The subscription form is created according the subscription panel configurations and appended at the end of the introduction text. If you want to place the form in the middle of introduction text above, use the {subscription_form} tag.
So I added {subscription_form} into the description, thinking perhaps this was required in addition to the instructions under the First Step.
At this point I was confused but sure I had done as instructed but didn’t understand why it wasn’t working.
It turned out that the small grey image that the widget created on my sidebar was the Subscribe button. I found the setting on one of the many pages that allowed you to add text to the button, and a blank box to enter your email address. However, I have just gone through all the pages in the settings of the plugin twice and I can’t find those settings again.
I suggest that you don’t claim that it works out of the box by simply adding the widget to the sidebar. Even if I were able to do that and get a Subscribe button and a box for the user to enter their email address, I would still need to create a newsletter and configure the other settings for the subscription to actually mean anything.