it really depends on the situation. as with all reversals, using it too much or being predictable with it is going to cause you a lot of pain. gear super has a really low hitbox so if someone senses it they will just block/safejump on your wakeup to bait it. however, the amount of time it gives you to do w/e (switch sides, setup UB's, recharge ignis, get dmg) makes the risk worth the reward.
while ca is more reliable, you lose a primer in doing so, and more often than not ignis will not be out to combo from it. it can still be baited as well.
best thing to ask yourself with 50 heat: 'will my opponent bait my reversal?'