I have used a lot of support systems in my day, but this is the best. At Exec we used UserVoice exclusively to manage all of our internal operations and support. We found it super easy to setup and use (no training required for our staff) and was reasonably priced. It was especially important how well it worked with, and looked just like, regular email.
- Automation through their API
- Statistics of Customer Service Requests
- Integration w regular email
- Login system