Hello,
I've installed SME a week ago (following previous efforts with IPCOP (18mths), ClarkConnect (1 week) and Mandrake (12 mnths) for a home network of 4 PC's) I like it a lot for its features and the fact that the soft and documentation are a oriented toward Server functionality without seeming to be religious about Linux.
The one thing I miss (from previous experience) is the long term usage and load tracking (and graphs on the Web interface) as in IPCOP.
Considering that SME will often run on less than state of the art hardware, seeing how performance keeps up (or not) with various levels of use, would be a very useful addition to the Server-Manager interface.
Many thanks to the people who spent their time on the product and support
Pete