Almost any lifestyle or diet change can be held for a few weeks. Most studies that show participants losing weight after a diet change don't hold up over longer periods (subjects are back to their old weight after a year).
So far I’m quite happy with it. I’m more interested in creating varied and interesting dinners, I’m still performing well with the workouts and I feel I have more time during the day as I’m not preparing and eating food so often.
Just my 2c.