Proform XP 110 is a pretty good elliptical machine.  It has four different interval workouts, ranging from 20 minutes to 45 minutes.  You burn a lot of calories using these interval workouts.  You can also choose to do your own workout by changing to resistance to your liking and determine how long you will stay on the elliptical.  You can also change to the stride on this elliptical.  It come with a water bottle holder and also a pulse calculator.  This elliptical also lets you know how many carbs you have burn off during your workout.  I really enjoy using this elliptical.  I feel like...