Acai berries

Shofie_1910

This has probably been asked before, but when i searched it i didn't find the information i really wanted.
I've been looking at diet pills on the internet over the pass couple of days and debating about giving them a try, i'm come to the conclusion that if i'm going to try anything i'd rather it be something natural. So i'm looking at Acai berries and green tea (Or both) from Holland and Barrett.
http://www.hollandandbarrett.com/pages/product_detail.asp?pid=1928&prodid=2104
http://www.hollandandbarrett.com/pages/product_detail.asp?pid=1625&prodid=915
Those are the 2 i've been looking at. Has anyone got any experience with these products or anything similar?

I want to be very clear i'm not looking at taking these so i can "cheat" and just lose weight without any effort. I just would like a little boost so my hard work is rewarded quicker (I'm very impatient!!).

Your opinions and any stories of past experiences would be greatly appreciated!