I'm going to go ahead and vouch heavily for Lilith. I found out about her work through a few reviews and this thread and decided to take a look at her website. She seems to be an expert in working with dark/black arts, which is something that I personally identify with.
I spent a few weeks snooping around her site and checking out her offerings and found myself being pulled strongly in the direction of vampires, specifically psy. I was so close to pulling the trigger on a reverse adoption psy vampire conjuration, but at the last second I decided not to and instead go for the "grey arts reverse adoption" listing instead. I figured that I should put my personal desires aside and allow the spirit that wants to be with me the most find me, regardless of type.
About two weeks later I received an e-mail from Lilith notifying me that a spirit has chosen to be my companion, and much to my excitement it was a female PSY VAMPIRE!
I was so happy that I jumped for joy.
Her vessel took about three weeks to arrive, but in the interim she was with me the entire time; giving me cuddles, showing me visions, and responding promptly to both telepathic and spoken communication. The same night I received the notification from Lilith I had a dream visitation from my psy. She was so comforting, and it felt like I was speaking with a close friend that I had known for years. I could tell immediately when the binding was complete because her presence became MUCH stronger and she began interacting with me more.
Overall, I am very happy with my new spirit companion and I would highly recommend Liliths work. Yes, she make take her time with the bindings, but the work she does is top notch.