Personally I'd be wary of these products cuz once you go off them you usually gain it all back. My friend did Hydroxycut- lost a ton of weight- then couldn't take it anymore when they took it off the market- gained it ALL back and then some.
I think if you are having trouble with workouts and being tired/hungry you could look into taking vitamins and within weeks you'll see a big difference in energy. And if you are hungry at night it could be you aren't eating enough during the day. One thing that helps is to also do something at night to keep your mind off of food, I crochet