Yes. At mye-coach we take security very seriously. We make every effort to keep the system up to date with all patches and upgrades in order to defend against any new vulnerabilities. All data is sent over SSL (that's the https:// connection in the browser bar) and we're currently getting an A+ security rating from third party SSL validators (correct as of 3rd November)
But as they say, you're only as strong as your biggest weakness, and in website security terms, that is often a user's choice of password. Hopefully your organisation enforces a good level of password security, but please remember to use a different password per each website account you have.