Recommendations to others considering Subversion:
This is an open source project, a number of vendors for binaries exists. Virtually every GNU/Linux distribution comes with the complete set. VisualSVN Server (free edition) is a very good start on the Windows Platform.
On the client side, TortoiseSVN is the most pooular client on Windows, and it includes a CLI. Virtually every IDE has integration and tooling. Review collected by and hosted on G2.com.
What problems is Subversion solving and how is that benefiting you?
We required centralized version control for the development of a number of commercial software projects, including integrations to bug tracking systems, continuous integration, code review and deployment. Subversion's performance is solid both on the server as well as the client side, with few developer issues.
The most important benefit was that due to it's simple usage model (one way to do things right), developer training was straightforward and cost effective.
From a single-server setup, I extended the deployment to a 3 site replicated Subversion with transparent write-through proxying for committing from anywhere and fast reads from the LAN.
Full disclosure: This review is based on my prior professional experience, and I have since become a code contributor to the Apache Subversion open source project. Review collected by and hosted on G2.com.