I made 2 orders almost 1 month ago and it seems it is a really strong PBN.
I got a report and all domains have TF not below 10, and CF/TF ratio is 1 on average, which means, seems these guys know what they do.
And what is the most important - my traffic increased x2, and links started dripping only 2 weeks ago.
I will make a 3rd order today. Hope it will keep improving.