They make good protection for assault oriented units like Chosen who also have access to Ranged weaponry. Drop in with some melta Chosen inside, Jinx for a turn, Disembark your next turn > shoot > Charge.
Its also amazing how great Fire Sweep is on the Dreadclaw Heat Blast rules as it allows you to fly over and inflict hits against enemies that are locked in combat due to the wording
It's an assault vehicle, that can remain relatively safe for a turn by deepstriking behind enemy ruins, tree lines and past fortifications, gain a good save, then disgorge it's payload and even HELP THEM AFTERWARDS. All for the low low price of 100 Points