I have been writing my text with using the siunit package, so far, along with amssymb and amsmath. But I have noticed that there is a package called siunitx and now I wonder if I change the package to siunitx, do I miss something from my document ?
Of course, after correcting the written codes according to siunitx package regulations.

siunitxis pretty much a complete and well maintained package. See also this one : tex.stackexchange.com/questions/21936/… – percusse Jan 17 at 13:05siunitxpackage. – Kurt Jan 17 at 13:09siunitnorsiunitxhas anything to do withamsmath, although as far as i know they can be used together. (they have different purposes.) and neither of these packages was developed at the ams. so i am removingamsmathfrom the tag list and the ams reference from the text, and modifying title. – barbara beeton Jan 17 at 13:28l2tabu! – Joseph Wright♦ Jan 17 at 13:38