Pros : fast, easy, no mess, you can choose to affix the came as you go or all at the end once your product it put together, no special equipment required except for an inexpensive heat gun.
Cons : none
Other Thoughts : I have been doing stained glass for several years and tried No Days Glaze for the first time last week. This product is great! It worked perfectly the first time I tried it. It's fast, easy and no mess what so ever as in the cement/whiting method . I'm not sure what the other reviewer was referring to about the glue showing. I had no problem at all with it oozing. As I mentioned earlier, it worked perfectly the very first time I tried it. I absolutely love this product! I will never go back to using cement/whiting.
Pros : Cement and whiting seem a lot less trouble now that I tried No Days Glaze.
Cons : Sorry this was a struggle to handle and it took me twice as long to finish a panel than usual. The stuff kept melting whenever the heat was anywhere close and then clumping up in all the wrong places as it cooled. Then even though I scrubbed all the lead lines, when I patina'd them there were gaps that the patina would not cover (I assume it was wherever the glue touched the lead). Try it on something little, a suncather, first and see how it works for you. I had to disassemble my panel, throw away the lead and reconstruct the whole thing.
Other Thoughts : I really wanted it to work. I'm disappointed.