Pros : Great variety of tiny glass tiles; they arrived without a single broken tile (which was actually a bit of a pleasant shock!)
Cons : I suppose if you wanted (or didn't want) a particular color, an assortment like this might not work for you... but then you would buy the colors individually, wouldn't you? ;-)
Other Thoughts : Your mileage may vary, of course, but my pack came with approximately equal quantities of 10 colors:
dark blue, light blue, mid-green, dark green and rootbeer-brown speckled,
as well as
white, black, yellow, orange and red solid