I've used Anastasia's Collectibles several times and had great all around service each time. I've met Derek at his booth at Frank and Son several times. Always seemed like a really good guy to me. Stan sigs earlier this year were $100 for the sig +$15 facilitator fee. I submitted through my own account and the books are graded at CGC now. Books were turned into CGC the day they were signed, it was great.
I definitely recommend submitting through your own CGC account. I had similar issues with the Todd McFarlane signing but I went through NYComics who I think were working together with AC to facilitate. Yes, the prices were outlandish, I had to submit through their account, and OVER 6 MONTHS LATER, I still haven't got the books back. I've contacted CGC several times and they were always very helpful with providing information. You'd think for $50 you'd at least get fast track grading. I'm sure you'll get your books, but I totally understand your stress.
I personally use Rich Henn quite a bit and have always appreciated his work. Doug from comic sketch art seems really solid and reliable too. I personally like AC and since they are local and I can drop my books off in person, I'd definitely use them again