Pros : Produces beautiful one of a kind glass that can then be used to creat one of a kind pieces. I slumped mine, had it posted for less than a day a sold for more than I imagined. Best tip I got was to use at least 40% to 50% clear glass to get the best results.
Cons : There’s a lot of experimentation to get the glass flowing right without breaking the bowl. Primary adjustments are in the holding time. You have to experiment with the amount of glass to use so you don’t ruin your kiln or kiln.
Other Thoughts : What a great way to make use of scrap glass.