Neuro Lean has anyone tried this or heard of it?

I recently purchased neuro lean from GNC. I got it discounted for $40.00 with a few free samples to try before I open it. I want to know if anyone has tried this or heard about this product before I open it. I use to take Oxy Elite before it got discontinued and I would shed weight quickly without putting it back on. I don't want to open this if it's not worth it! Thanks!