The NordicTrack E5 SI Elliptical Machine is a great addition to my home exercise equipment. I purchased this piece of exercise equipment because I wanted to add a little variety to my exercise routine. I chose the NordicTrack E5 SI Elliptical Machine because I heard excellent things about the NordicTrack line of machines. I made the right choice. This elliptical machine is well constructed and sturdy. It stands up to frequent use and rigorous workouts. This machine is easy to operate and the movements are very smooth. This elliptical does not "catch" and it allows you to make fluid movements as you exercise. I like how you can adjust the resistance very easily and really increase the intensity of your workout. Overall, I am very impressed with the NordicTrack E5 SI Elliptical Machine and would highly recommend this machine to a friend! Performance This machine is amazing! I get a thorough workout when I use it.