the basic kit detects if there is mdx in the pill, ok got a good pill go with it, turns up blank throw it away or send it to dancesafe. who cares about the pill if it doesnt test for mdx/2cb/dxm/etc.
Some people care about PMA, for instance. Others may want to make sure there is no MDA in it. EZ Test X-TREME provides an indication for those substances (among others).
aj