They might make good counts as Inquisitorial Stormtroopers and they have special orders that aren't available to the ones in the regular Imperial Guard book(AM). Each order can give them one of the following, Twin-linked, Preferred enemy, Sniper & pinning(only one shot tho), Crusader, fleet, or rending if their shooting at vehicles or monstrous creatures. Also a couple Formations and Warlord Table, not Relics tho. One of the Formations is a Commisar, command squad, 3 units and 4 Valkeries, they all come on together from reserves and when they deploy from the Valkeries each unit gets Twin-linked and split fire. The other formations is pretty similar they just all come in Tourox primes, same bonus rules.
Is it worth it, IDK, theres not many rules but the fluff is kinda cool and they could make a good fit for some themed forces.