I'm all for the elliptical. I used to be obese, but in January of this year I bought an elliptical and I could barely do 1/4 mile. I put myself on a regimen (6 days a week - religiously), and I started with just 1/4 mile and everytime I trekked on the elliptical I added 1/4 mile. I eventually got up to 5 miles. I then started ramping up the resistance. Now I do 6 miles a day, 6 days a week at full-on resistance. I've lost 40 lbs, gained muscle. My body is in much better shape, my face looks much better, I have more energy and I'm more confident. And I only spent $150 on a cheap elliptical. Thus far, the elliptical has been a wonderful experience for me.
My goals now are to stay at 6 miles a day, 6 days a week but using the isometric resistance, keep creating more resistance - which breaks down and builds muscle - with the proper nutrition of course.
In addition to exercise, I drink two servings of a designer whey protein, enhanced with l-glutamine which is very important for those who are doing serious cardio training.