Nothing compares with custom development.
Yes. Product failed to start periodically. No tolerance to DB outages.
We did not have significant load, but one physical server instance was able to serve around 100 concurrent users.
Four out of 10. They try to push all issues to the implementation team.
Licensing is expensive. You need to wisely select between per user and per case.
Appian BPM and Activiti BPM.
Have a strong skilled architect.