Anadrol is often used as a booster at the beginning of cycle for the 2 weeks before the test kicks in. It will make you a hell of a lot stronger in a very short space of time, but it will also cause lots of bloat in your face and water in your muscles. It is hepatoxic as a bitch too. On top of that you will keep very little of the gains made from using Anadrol, even if you have good PCT, but if you are using it at the beginning of the cycle that doesn't really matter anyway.
If you take a little Arimidex with it do you don't retain as much water it is OK. It is pretty much a kick starter like DBol.
If you are talking about using it on its own as a stand alone cycle that is absurd and shows you know nothing about steroids. You can't use it for more than 3 weeks because it is so harsh on the liver and most of the weight you gain will be water weight. It will shut your balls down HARD so they produce no natural test.
If you use Anadrol on its own for 3 weeks you will get a lot stronger and a lot bigger for those 3 weeks. As soon as you stop, even with good PCT, you will loose all the weight, you will lose the strength, the Anadrol with aromatise and your estrogen levels will shoot up. Your Cortisone (or is it cortisol) levels will shoot up and where you were previously in an anabolic state, you will now be in a catabolic state, which means your body will use muscle for energy. You will be weak and fluey and you will have terrible training sessions until you take enough Clomid and/or HCG to kickstart your balls again. By that time the Anadrol gains will have gone and you will be no bigger than before you too kit, but you will be less healthy.
People don't use Anadrol or Dbol as stand alone cycles if they know what they are doing. A Real cycle includes test, and because test takes two weeks to start working, Anadrol and DBOL are used as a kickstart at the front of the cycle. that is it. They are not a cycle and they aren't to be used alone.