I didn't really know what to expect - it was generally intended for the general population not goth specific, so the horrors could be that bad. It was also open for children above 14 years of age. Seems like the youth of today is pretty emotionally blunted, since I think I would have been scared by some numbers in that age...
The show was good. The entry was through a small horror labyrinth with human "scarers"and ended up in a circus tent decorated with spiderwebs, flying bats and demons. You could buy red popcorn, the usual coke and spooky drinks (vodka redbull with dry ice...) for high but still reasonable prices there. As the seats are not numbered, I recommend being there early: We were seated right in the middle next to the motorcycle ramp and had an excellent view on all attractions.
The music during the show was (besides one horrible interpretation of Gangnam Style) really good with songs from Evanescence, Rammstein, Voltaire and Marylin Manson. The moderator was an rather unspooky vampire, but the mask was great. The artists included "hamster boys" (two guys in a huge running wheel), a creepy clown who just wasn't funny, some dancers (the only part of the show they could have just skipped, but the men in the audience were delighted *sigh*) and general artistry.
The part were the circus was different from all the others was a little freak show. Horror makeups, better music and people who pierced themselves on stage. Even a girl who was hung by piercings in her back and did a flying act! Another cool act was the frog from France, an artist who can twist his spine in very fascinating ways!
All in all, the Circus was great. I had great company, some of the numbers were really cool, others just okay, but I can recommend going there!