Cons : Most disappointing unpredictable product I've ever experienced. I question why Delphi still offers it. My perfect beautiful works of art have totally disintegrated in the garden into piles of mush. EVEN DELPHI MOSAIC specialists have had problems with this product. I would recommend avoiding this product at all costs unless you are prepared for heartbreak and frustration when you see your hard work and beautiful art become a pile of mud over time. So glad I didn't make a bench!
Other Thoughts : PS I followed directions to the detail and the stones were in my garden in a moderate climate for less than a year when they disintegrated.
Pros : This is a superior product, that I've purchansed MANY times. I prefer it over some others I've used. You won't be disappointed. Stepping stones stand up under extreme weather. Holds glass, sea shells and other decorative pieces placed in the cement very well.
Cons : I have not come across a negative aspect of this product. I've literally used dozens of boxes.