I have various non-programmers (project managers, CEOs) checking files in and out of Subversion using TortoiseSVN on Windows and that works acceptably. About on

I have various non-programmers (project managers, CEOs) checking files in and out of Subversion using TortoiseSVN on Windows and that works acceptably. About once a month they get stuck and need help but they use TortoiseSVN daily so that's still acceptable.