Pros : Well made mold. I own two and fire them frequently. No problems. I use regular HotLine shelf separator because the large flat surfaces don't merit using boron nitrate.
Cons : Wash can get scratched off if you're not careful loading the mold. It can be difficult to determine the fill amount if you're not used to this style of fusing.
Other Thoughts : If loading with scrap in particular I suggest small L-shaped pieces of fiber paper in the corners or along the edges.