I've used deer antler velvet type products before and saw some benefits: better sleep, faster recovery, and just felt good; but it wasn't anything dramatic. The cost out weighed the benefits for me. Now whether this product is any better, who knows. Also with their "humanfort" combined, whether it really boosts test levels as they claim is unknown.
If you do try it out, I would be interested in your thoughts, but as for me I am skeptical...