Cornerstone is the best and most comprehensive solution that I have seen for talent management. I have used the LMS, Performance, Succession, Connect and Extended Enterprise modules. CSOD continues to make enhancements to their product, especially with Learning, Connect and Performance, but where they are lacking is in enhancements to their mobile app and to their Succession module. While I do find great value in reaching out to their Global Product Support team, it will sometimes take days and even weeks before you get a response from them on a case. The communication to the customer is lacking there.
Additionally, I find that some of the modules, such as Performance and Succession, can be really complex and require a lot of testing and trial and error to get things right. It does help that you are given two test environments (Stage and Pilot) to test things in. The quarterly releases have also gotten better over time, with many resources that can be used throughout User Acceptance Testing and the rest of the release cycle.
Change is not always handled seamlessly for the customer, as we have experienced major delays when our Account Manager was on leave and also our Client Success Manager was out on leave. The people who filled in for them seemed overwhelmed and as a result there was a lack of communication.
Applicant tracking seems on par with many other vendors, but the advantage that you get with Cornerstone is that it encompasses all stages of an employee lifecycle using their platform - from hiring and onboarding to termination. You will have a full record of your employee using their TMS.
Overall, Cornerstone is a great encompassing talent management system and I have not encountered another company that comes close to what they offer.
Ease of use