I tried the RSR a couple of days ago. I had a list with 1 blaserchon on venom with helm of spite ('cause I assumed that he'd use mephiston, which he did, and due to a perils of the warp, lost his last wound, and due to kingslayer+trophy hunter+slay the warlord gave me 4VP), 4 gunboats, 2 hwb scourges, 1 hl scourges, 3 RWJF and 1 Voidraven against a tailored anti air/anti DE Blood Angels list with a stormraven, a nephilim (I let him use it) and a storm-potato*, and jump pack heavy. And it was maelstorm. (I don't tailor list, I just take the units I like)
I would not have any use of ObSec. I did have more use of 6 FA. All though he got first turn, I hid well, and he used it only to move and hide, not shooting a single shot, making me waste my cover save.
Blasterchon + venom
1 Raider wrecked, 1 immobile and down to last HP, and 1 down to 2 HP (1 raider and all kabalite warriors unharmed)
Nephilim down to 1 HP
VP: Me:11, He 9.
It was an even game, but I won, and I feel that I had more use of RSR that I would ever get from ObSec that game.
* His stormtater, having 1hp left, went to hover mode. His Nephilim shot down my Voidraven, which crash and burned, and landed right atop of his storm-potato, wrecking it.