Curt...
I am a funny guy to respond to this because I do not currently have a production SME install. I administer three machines: 1 Debian, 1 WBEL, and 1 Fedora Core 3. Two of these are in heavy daily use by a school. The other is a backup, administrative machine at the same school.
Two years ago I contracted to set up a linux machine for someone else to administer. I picked SME. It does a few things very well. It has an excellent selection of packages, and it is designed for a non-technical person to be able to manage users, shares, etc. w/o hacking *.conf files. You set it up correctly, and it is the energizer bunny of the server rack.
SME has a few quirks, but it is an excellent collection of packages, and if I were today setting up a server for someone else to administer, I would probably pick SME. If my brother in law wanted a server for his small business, I would install SME and show him a few things. I would not be expecting to do a lot of tech support.
Regards... Tom