As far as I know
none of their releases are bootlegs, in fact they are one of the oldest labels in the German genre market. They changed owners a few times if I'm not mistaken, but as of now the label is run
by its founder again (who is also notorious for directing god-awful dtv trash). Their old dvd releases were hit and miss (I'd personally rather say it's the latter), often thrown together with little care and sometimes plagued with sheer technical incompetence.
Since their move to bd it's got a lot better. I guess they now just use the available international hd masters, leaving less room for failure.

I don't have many of their bds but those few that I got are good or certainly not below average qualitywise. Still, whenever I hear they release a new title my inner voice cries: Too bad it's not a CO, Filmart or Subkultur release. I hope my ramblings don't come over as too cynical, because as of late I am sure their output is on par with what one can expect from a capable label.