Just noticed this thread...
I went and got my impressions done last Tuesday. Today, just for kicks, I e-mailed Matthew Sinisi at ACS to see how everything is going. He said they hadn't received the impressions yet, and he would contact the audiologist for me to make sure they sent them. I told him who I used (Mandi at Estes Audiology in Georgetown Texas, near Austin). He said she's one of their best and that everything should be in order. He then e-mailed later this afternoon and told me they received the molds from UPS and they look great. He also said they'll be contacting me tomorrow for payment information.
I haven't had any of the negative experiences I've read in here so far, of course I haven't received my tips yet either. Etymotic (I've owned their products for 7 years and have dealt with them directly a few times with tip trials, fit issues, etc.), the audiologist (and her office peeps), and now ACS have been nothing but stellar to deal with.
I'll update again when I receive them, but so far so good.