@RobbieO You need to clarify what loose means?? If you are talking about steering than tabs won't really help that, I would recommend fins.
Tabs will take the slapping, jumping and porpoising down a great deal and eliminate it in 1-3 waves. Anything bigger you won't be running fast so it won't benefit you. In anything less than 1' waves you probably won't deploy them, but could a bit.
As I have mentioned before, if you don't boat on big water or are not in heavy chop much, they may not be worth it. If you are in the ocean, bays, very choppy waters, Great Lakes, they make a world of difference.
@Neutron 's take on them as well is spot on, imho.