I did not put the maximum amount of stars because there was an unfortunate conflict between this extension and my RSS feed. I had to disable the former eventually.
I would however like to mention the outstanding support that the author has provided. He could not find the issue even though he painstakingly tried to reproduce the error by replicating my site config.
So in the end, I unfortunately can't use the extension (probably because of my site setup) but I would still heartily recommend it!