you can check out here the benefits of rowing machine
Rowing is a killer cardio and strength workout and it can be very helpful to you if weight loss is your prime concern because it can burn about 377 calories in just 30 minutes of exercise for an individual who weigh about 180 to 190 pounds.
In-fact I covered a blog post around it here http://prorowingmachinereviews.com/rowing-machine-benefits/ for in depth analysis of overall benefits.
The rowing machine is a great piece of equipment!
a) Uses the upper AND lower body (more upper body usage than running)
b) Allows interval training (easier than getting off a moving treadmill belt!)
c) Concept 2 rower has various displays (to prevent ‘same screen boredom’)
d) Easy to move (in case you have to move it!)
Enjoy the rower!