Opinions on strcpy_s, strcat_s, etc.?

["Jared W. Robinson" <jwr () xmission com>]

Who's had experience using the new strcpy_s, etc. functions?
What are your opinions?

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncode/html/secure03102004.asp
http://std.dkuug.dk/jtc1/sc22/wg14/www/docs/n1031.pdf

- Jared