To serve the purpose of enabling uninterrupted enjoyment of the Nero's Black Book, this website has been resurrected and its code cleaned-up and corrected and future-proofed by UZANTO-RETO®.
  Nero's Black Book  

OUTSIDE REVIEWS
You won't find any reviews or ratings/rankings on Nero's Black Book. This is a conscious decision on my part. I think different users will get different results based on their experience, equipment and what they're looking for. However, I understand many of you want to see how some people feel about the performance of the various Indexers/Providers. So, I've listed below a few sites that offer their opinions/reviews. I only list them here to save you some time searching and I have no opinion on their reviews. I neither agree or disagree with these reviews.
 

TopUsenet.de
This is a German site so you'll need to run it thru Google Translate. Lots of information on Indexers and Providers.

Cogipas
Tons of information on Usenet as well as Torrents.

Ngprovider
Can be a little hard to navigate but still has a lot of info.

Reddit r/usenet
r/usenet has a large following and a great deal of info thru its wikis.

Reddit r/UsenetTalk
r/UsenetTalk has a great deal of info thru its wikis.

Usenetreviewz
Another big player in the Usenet community. Use the site map as a starting point.

Newsgroupreviews
Established site for all things Usenet.

Greycoder
Not very many reviews but still worth a look.

Vergelijkusenetproviders
I guess you could call this the Dutch version of Usenetreviewz. You'll need to google translate.