no spam
I signed up and have not received one email from them or any increase in spam email - as far as reliability, not sure since I don't fly - I saw it in another thread a few weeks back, and decided to check it out, boredom was the only reason I signed up for it. I think it's worth checking out and signing up for. I can only speak for the spam email question that you asked. Any other info would have to come from a pilot that's used it. Fly safe!
Regards,
smooshfacekitty