Its not as simple as yes and no...winstrol will definitely allow you to maintain muscle mass during a calorie restricted diet. The pros use it as a pre contest drug for that reason. Water retention is nill with Winstrol (winny) which is why it is used for pre contest but your question is kinda vague. Are wanting to only run winstrol because if thats your direction then I would definitely say do not do that. Winstrol will shut your natural test production down very quickly and you will have nothing to offset that. When your natural test levels drop and you dont supplement with exogenous test you are asking for trouble. Not only will you start to feel the side effects of low twst but you will also experience low estrogen sides as well and many people underestimate the importance of proper estrogen levels as well...so I would say give us a little more explanation of what your goal is and some personal info as well. Age, weight, experience, etc