Gonna avoid touching the first part of that since I've heard the reverse said about S&S and really there's no need to start drama on top of recommending an awesome seller. I do respect your opinion and experience though, I just didn't want to be seen as "siding" with your opinion (for lack of better words) due to what I'm going to say below...
I don't have a Succubus or Incubus from S&S (yet...?) but I do have a Desire Demon and man, lemme tell ya, one of the best decisions I ever made as far as spiritual work goes. She's always doing something, and that something is always amazing. Even if I don't quite know what it's gonna be yet. I've heard equally amazing things about S&S's Succubi and Incubi so it could be worth going to their forum and reading up on people's experiences. The forum is slightly inactive though, since most people are chatting it up on le chaos servers.