Cardarine gives you an endurance edge, so yes you will get fitter "quicker" but you have to put in the work and be able to maintain it. As for being healthy/fit and it stopping cancer not true bro. I was prime shape and got diagnosed with severe UC and stage 3 colon cancer in 2012, after 3 chemo sessions said fuck it cut the shit out.
Despite this, Cardarine is incredibly effective and will absolutely aid you in Cardio. Also if you're looking for fat loss, obey the law of thermodynamics. Increase calorie expenditure through cardio or decrease calorie intake through food. Cardarine can help your expenditure, but don't expect it to magically melt that bellyfat for you. Cheers.