Pros : Strong. Predrilled. A nice overall mold.
Cons : The neck on my mold was crooked if you look at the mold head on but nothing that really effected the final product.
However, it comes with not even a hint of how to use it and since slumping wine bottles is not the same as fusing regular glass that would have been nice. I am still trying to get the exact right combination of heat and hold.