Pros : Love the deep drape it makes. I've used it twice and I'm excited with what it does. Still need to practice to get a perfect result.
Cons : First time I had a terrible time getting the glass off the mold. I soaked it in water and the next morning the glass came off with a strong tug. The mold dried and was good to go again.
Other Thoughts : The second time, I used two thicknesses of thin fire paper over the top even though I have many layers of kiln wash on the mold. The glass came off easily.