Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

Ghostwalk lets you land in, or across, terrain. This is very handy if there isn't normally room to land without taking a DT test.
For transports, this is very useful, as the vehicle lands in cover, and the troops run out and hide behind something.
Also, some units get to avoid jink saves (Dark Reapers), but don't avoid cover saves. Having layered saves can often be the difference you need to keep it alive.

Star Engines will get you up to 36" across the table, to drop off troops the next turn.
Add a holofield to this, and that's a 3+ jink save (I think, check the rules on flat out).

The best combo from above (better used on Falcon/Fire Prism) is the targeting array and star engines.
Zoom the full 12" + 24" and still get a full-BS shot off.

I always take mine Twin Linked Scatter Laser, Shuriken Cannon, Holofield. Always. The chin cannon is useful mainly for flyers, as it averages another 1 S6 hit, and adds a bit more torrent when you only move 6'.

I've not taken the GWM, but have thought about it.