I can't imagine why Gary would come to this thread. People are trashing the movie before seeing it and basically trying to taunt him into defending himself. It's mob mentality, which I see a lot with a lot of movies.
I think of myself as a smart movie watcher: My husband and I love foreign films, comedies, comic book movies, horror, sci-fi, drama, musicals, documentaries, anything well writen and/or entertaining. I have to say that even I am a little curious about this movie. I'm not a fan of Scientology, Jaden Smith (though even I just realized I'm not sure why - I've not seen anything he's in, I've never given him a chance), etc.
Whether or not this is a "love letter to Scientology" (hint: it's not), I'll at least watch it to see if it is a good film because the story seems interesting to me. It may be bad but I happened to love Book of Eli (and thus Gary Whitta) and Will Smith has been entertaining me since I was a young kid (though I'll admit that I've avoided most of his recent movies). I've seen many movies with religious tones, themes, etc. that I've loved because the movie was good. I'm still a super confused person with no religion or solid beliefs who is turned off by most religious groups.
So...long story short... If it looks interesting, watch it. If not, don't. No need to buy into crazy theories or come to conclusions based on reviews you wouldn't trust otherwise.