Yes, I was able to increase my strength considerably in my key lifts such as squats, deadlifts, incline dumbell press, pull ups. But the thing is, I have been training only in the 8~12 range for a long time and recently started to use the 1~5 rep range. I think the change in rep range was the main reason for my strength gains and the ability to maintain muscle mass while cutting. It's hard to tell whether or not GABA's effect on growth hormone played a role in this.