The releasers can help with sleep, recovery from workouts (maybe more as a direct result from the improved sleep), fat loss, I suppose minor injury..
I noticed my skin improved, and my hair felt thicker...
Many of these things I noticed in a few days of use (I used p-GH trans)
It would depend on if you were focusing on a particular result. Although I did enjoy using p-gh for the reasons above I mentioned; just keep your expectations reasonable