For me, DAA is a staple.
I've been taking 6 grams a day since at least mid-May. In fact, I was off and on it for all of this year before that even - but since May I've been on it steady. First on TestForce 2, then the NutraPlanet DAA (which dissolves like ****), and now Formula X (which I LOVE!).
The only negative effects I've had are:
1. I had my free and total testosterone levels come back HIGH in a blood test I did in September. My total test was 950 ng/ml and my free was 34 ng/ml.
I can live with that side effect.
2. I have developed the "hots" for this fat girl I see in the gym each morning. Her ass is as big as Jupiter - but it looks like heaven to me!
I will be cycling off it in January though - but not because I think it's harmful - just because I think my body will adapt to it and it won't be effective if I run it all the time.