I searched years for a two-door "substantial" glass/screen set in black, and gambled on this. Bi-fold sets are noisy, prone to malfunction and cheap looking. This is extremely high quality in manufacture, materials, functionality and appearance. It's significantly better than what else is out there that I've been able to find, and I've had fireplaces my entire life. My highest recommendation, and I'm picky. 

Pros: appearance, durability, functionality
Cons: Somewhat difficult installation due to its weight.  It really needs two men. But the weight makes it worth it.