The plugin does what it says and works very well.
I had previously written a very negative review, but I have changed it now. The reasons for it can be seen below.
After its last update, this plugin stopped working.
The comments area disappeared. It kept showing a pink background message "Param numposts must be a number less than or equal to 100"
So, I went to its settings and in the "Comments plugin" tab set the number of post to 100 (it was in 1000, before). It did not solve the issue: The message disappeared, but the comments area was not back.
I set, then the number of posts in less than 100. Same issue.
Since on our site there are more than 100 posts, I am starting to suspect this not paid version of the plugin has a limit of post to be used. After it, it just disappears from the site. IF THIS IS SO, it is stated NOWHERE.
I tried to go to the support forum, but there is no help there unless you pay. Since I don't know whether the problem will be fixed (you can read other reviews of people who paid and didn't get a straight answer), I don't feel like paying.
So, basically, do not add this plugin to your site unless you don't mind paying for support you don't know it's going to work.
My last post after the answer of the author and some updates of the plugin
Since the original issue described in my original review is not happening any more, I am changing my review to a more positive one.
Besides, Marcel Bokhorst took the time to answer to this review, and the apparent "pay if you need help" was clarified.
The plugin has had some updates since I reviewed it, and now it works just perfect on the site (http://www.curicoalbirrojo.cl).
I recommend its use, and I am considering upgrading.