I've had a Grand Slam for about 12 years. I can't speak for the 'current' APIs (I think they're made in China), but I love the one I have. That thing really bites a tree: the contact points are a 'sawtooth' design and are beveled to boot. Straps to the tree with a chain that is secured with pins. I don't like some of the other attachment systems out there, they don't seem as secure.