Hey Bro, First off "Halo" is probably the coolest name for a steroid. So that in itself is pretty promising. 

Ok, for real though. Halo is pretty amazing at the right time and place. The problem is, it can be expensive and very exotic, hard to source. Thankfully, Naps Gear has that covered. Geneza Halo is legit. I've used it 4x over the past 4 years. Let me back up a little though. Ok, picture a birthday cake. If you're dieting, that won't be hard to do. Lets say that some form of Test is the cake itself. Thats the base, what makes the cake a cake. Then we have the frosting. That would be your hardeners. You're DHT's and tren. These are things that will be important but not as important as the cake. THEN, you have the frosting flowers, on the frosting, on the cake. This is detail that brings the whole thing together. This is Halo. Halo will get you harder and more grainy than test/tren/masteron alone. It will also make you super strong, quickly. 

With this comes some down sides. Halo is one of the harshest steroids there is. Within a couple of short weeks, your liver values will shoot up through the roof. Average dose would be NO MORE THAN 3 WKS, at 20mg. I would start with 10mg taken about 1 hour before training. See how you do. Then if you like, go to 20mg. 10mg in the AM. 10mg before training (assuming you train in the eveing). Besides the sides I mentioned, because it is so strong, it can also cause an increase in aggression, which can be helpful in the gym, but keep an eye on yourself, in the rest of your life.