Results wise, users should expect extreme strength increases and weight gain in a relatively short 2-4 week period. Weight gain upwards of 20lbs in 4 weeks is not unheard of with this incredibly potent compound. Although subcutaneous water gain would be minimal, intramuscular water retention should be expected. This is due to inhibition of 11b-hydroxylase and build-up of mineralcorticoids which encourage salt and water retention within the muscles. The most obvious physical effects will be improved vascularity, aggressive muscular pumps, and oily skin.
While methyldrostanolone can stack well with most other steroids, it should never be stacked with another methylated (17aa) steroid.
Okay, so the most important thing concerning water retention is aromatization of testosterone into estrogen. The ratio of testosterone to estrogen is what determines how severe your chances are for developing serious estrogenic affects such as gyno. So what do you do if you are one of the unlucky few who are susceptible to gyno? What if you just want to use strong drugs but don't want the water? What if you are prone to "potato" head syndrome and seem to bloat up no matter what? Your answer lies in proper use and understanding of anti-estrogen and anti-aromatase drugs.