I am a 51 year old man, 6'1" and 215 pounds, with very arthritic knees who is not allowed (Doctor's orders) to walk or run and must use a no-impact elliptical to exercise. I bought this machine more than 3 years ago, in July, 2012. Since then, I've used it hundreds of times, burning up to 1,000 calories per session. My knees feel great using it, the calories burned are real, and the E1000 paid for itself in terms of gym membership savings within the first month!
Also, as tiny parts have worn out (inevitable with any workout machine if you are a large and and use it as much as I do), I have found it EXTREMELY easy to get replacements from Stamina. Their customer service department is INCREDIBLY helpful, and the parts are very inexpensive and easy to replace.
This is EASILY the best workout/exercise machine I have ever purchased. I plan to have one of these until I die.