I am looking for a treadmill that not only can give me challenges and display things like hills and tracks but I am looking for one that can also give me a lot of description on what the workout is doing for my body. I think that the proform 1100 treadmill specifications has a lot of what I am looking for including the built in fan right at the level that I want it. I want to see exactly how many calories I am burning and to make sure that I am running the exact mileage that I want to everyday.