Hello, I am downloading this as we speak and I am moderately excited about it. I enjoyed Sisterly Lust for the most part and am a huge Sci-Fi fan, so those are two things very much in its favor. I'm also not worried about future content being optional or not. While some of the fetishes discussed are not ones I would explore IRL, I honestly don't mind seeing them explored in a game where I can detach myself from the action. Plus I figure if the Dev put so much time rendering the scenes it's only fair I give it at least a look. They might not be a turn-on, but to me they wouldn't be a turn-off either. Except Scat.
How big a part of the action is going to be Boink The Alien though? Like I said, not a turn-off, but I prefer my partners to look at least human. I never understood Furries either (if you are into that, just stating a personal preference, not trying to start a flamewar) but I guess anything more outlandish than maybe elvish ears and a sex scene becomes just scenery to click through until the next good part.
Anyway, I'm going to unzip now (in more ways than one) and hopefully my next post will be a little more constructive.