So after reading this thread thread I though i'd give PBN Labs a go. Gotta say, i'm majorly disappointed.
Nice interface, easy to get the hang of. Kind of annoying to setup as you have to keep going back to it hourly, it only scan 2 levels max. It did find me a bunch of domains, however, when I verified the data on my own Majestic/ Moz premium accounts, every single piece of data that site provided was wrong. The TF, CF, DA and PA we're all completely wrong. I checked the root, http and www version, I have -no- idea where it's pulling this data from but it's not correct in the slightest. For example: wine-wagner-vision.com is apparently a TF 27, CF 23, DA 23 and PA 21 site. It's not even half that in reality.
I checked 105 websites that PBN Labs gave me and 100% of them were wrong, this thing is like $350 p/m too. Wow. If I used this to buy expired domains, I would -think- i'd have a TF 25+ network but in reality a TF9+ network.
Domcop is the same by the way, if you use either of these web based one, VERIFY the data for the love of god. DHG is great for web 2.0's and the occasional expired domain, for the cost it's great. Scrapebox is retro cool too.