Gravity Industries – Jetpack Demo [video] (youtube.com)

Don’t like the rockets on the arms. Ive seen a different jet pack that doesn’t require them.

Impractical. Highly likely the ship has motion detectors and some bad dudes aboard who can pick them off easily. Best to hail the vessel and tell them the game is up. I honestly can't think of any application for this other than high high dollar recreation. Maybe extraction or medical aid.