I have worked this several times in my life and am currently using an 8 hour window, taking one or two meals in between noon and 8pm.

Yes the weight does leave, sleep improves and the concentration is greater.

But for me the greatest benefit is feeling empowered, not being a slave to a clock or urge for food. It frees one to go through a day less encumbered and accomplishing more. And as I am also a prepper type, it is preparation for diminished food supply instate of emergency or turmoil.