I'm happy to be corrected but I think that eating like this can slow down your metabolism. Instead of keeping it ticking over, it is swinging between 'famine' mode (eating nothing) and working. The problem with sending your body into famine is that it will make you conserve fat and sugar for when you next go into famine, and you can put weight on as a result.
Also, it makes your body systems fluctuate wildly between nothing and everything. Therefore - depending on what you eat - your pancreas will have to work hard at kicking out insulin to get your blood sugar down, your stomach will have to work hard at kicking everything out and into your bowel, and so on. Then everything will go back to not working - it's all or nothing. Also - and don't want to upset you - but I can't see how it's possible to eat a balanced diet when you eat all of your calories in one sitting.
As I said, I'm no nutritionalist, and I'm really happy to be corrected on any of this.