I used their products a LONG time ago, but I'll tell you what I remember of the products I used from them in the past (by the way, I'm a natural 4a)...
The Power Gro shampoo from what I remember was OK; it had a strong jojoba/peppermint scent to it. It's not the most moisturizing shampoo; but it's not overly stripping either.
The Power Gro Intensive Herbal conditioner was HORRIBLE for me! I hated it so much! It was like using a thick hair cream or hair butter as a conditioner; moisturizing, but didn't detangle my hair AT ALL. I would recommend the Power Gro Silk Rinse instead.
The Lavender Moisturizing hair lotion was very nice. My hair was very soft, had no frizz and was easy to comb. However, keep in mind that it DOES have petroleum/mineral oil as an ingredient. Their Power Gro hair grease does as well.
The "Herbal Tame" is basically a packet of herbs and henna. If you're used to henna, then you'll know what to expect. If you're not, then don't expect it to replace a relaxer since it can't really straighten hair (at least it didn't straighten mine).
The Smooth and Silky hair spray was a very sticky and horrible product, according to someone I know who used it. It didn't help her blow drying and pressing much (she's natural).
I found their Headstrong Ultra Care shampoo to be stripping.
Overall, I would say that Gold Metal is a decent hair product line, a bit overpriced IMO, but OK. I grew up using it on and off so I can't really come down too hard on them
Hope this helps!