I am about to shift over to Clark Connect 1.2 from SME 5.5. I've found the templating system to be a bit too fiddly for my liking, though I can see the benefit of it. I've noticed that the web interface is much nicer and faster than SME. The printer configuration uses CUPS, which I got working in a relatively short time (never got the SME printer config working). It has an intrusion detection page which is a nice addition. And with the addition of webmin, I see myself using the command line a lot less. Not to mention the 2.4 kernel and use of IP tables. That said, SME has been a brilliant addition to this environment (serving 40 users e-mail and file sharing), replacing an NT server which caused many headaches in the past. Time will tell which platform is superior.