Yes we did have issues with deployment.
Yes we did have issues with stability.
Yes we did have issues with scalability.
Yes, a customer used a different solution. We switched because the new solution can cover/manage most of the in-house systems/suites of apps.
Very complex due to the different sub-components.
Yes, we implemented with the help of vendor team support. Their level of expertise was about 7/10.
Short term, it was great but longer term, it became an issue.
Do a traceability and survey on what you need in the next 5 years, 10 years, etc.