I have. And I'm terrible for not being able to deny myself anything. I used an app to track my approximate calorie intake. I wasn't anal about it, just wanted to know the sort of things I could / could not eat. Bread was out, and also diet drinks and / or anything with aspartame in them.
If I wanted a big breakfast, I balanced it with a small dinner, and vice versa.
The kicker is that I walked 6 miles, three times per week, as fast as I could, no matter what. Didn't matter how tired I was, or what time I got home from work, somewhere I fitted it in. Speed is important too as a slow amble won't be sufficient to burn. When I started it took ages, but by the time I finished, I could do it in about 75 minutes which isn't far off running pace.
If you can stomach the gym (I couldn't) then weights are your friend as you will burn much more rapidly, however if you do this, don't use weight loss as your guide as you will increase muscle mass. Use dimensions (I focused on waist size).
You can do it, just be consistent.