Pros : It has everything you need for jewelery projects.
The Diamond Grit is great as I use a microwave kiln and sometimes its hard to control the temp. and kiln paper will stick, it easily removes that and smooths the back of my cab.
Cons : The glass square does not have any measurement indicators. It was one of the reasons which I bought it together with my Fuseworks Kiln.
Other Thoughts : If I need to buy another set again. I probably will go for the Glass Value Kit #5015 just because I don't work on big items and it seems to have a ruler.