Jumping rope can burn a lot of calories each hour, up to 700-800 calories/hour depending on what intensity you're jumping at.
if you can jump at a high intensity for 30-60 min, then go for it! I personally just use an elliptical and burn about 600 calories.
Keep in mind that jumping rope in and of itself is not going to get you into shape, you need to make sure your diet is in check.
If you're eating too much, no amount of cardio is going to get you into shape.
Find out what your maintenance caloric intake is (bodyweight in lbs x 15) then eat at lest 500 calories below that to lose 1 pound/week.