Is trimspa safe/effective??

I am thinking about trying trimspa along with my exercise and eating right plan... is it safe?? is there anything I should know about it before using it? I have gone to other websites and read a lot of info on it, but I would like some personal input... What do you all think? Will I loose more weight with it? is it just water weight that will come back when I stop using it??
Thanks in advance for any replies!! ;-)