My verdict on the trailer:
It's okay. A little dark and unfocused, but I suspect that this is due to its source. The sound design is interesting, if you listen carefully you can hear Alexander Courage's theme creeping into the sound shortly before Nimoy says 'Space'; the use of the Transporter as a whistle is similarly good.
Not so fond on the guys with goggles welding stuff, though. Somehow it looks too modern.