I agree with System Shock. If you purchase the commercial version (Tectia), you will have someone accountable if something goes wrong or there are problems. Not the case for the OpenSSH version. Actually, the line on their website (
www.ssh.org) says it all: "Original. Secure.
Supported"
If you are going to be using this on a large scale, I see no harm in going for it.
And no, I am not against open source systems.