My company is a small IT Staffing & Executive Search firm considering a move from JobDiva to another applicant tracking system/crm.  We have looked at a bunch of them over the past 6-months and have narrowed it down to the following:

• Bullhorn
• PC Recruiter
• Job Science

I would like to get advice from others in IT executive search on the following:

- Who is using Bullhorn or PCRecruiter or JobScience now and do you like it?
- Who has migrated from JobDiva and what ATS did they go to?
- What ATS do they like the most and why?
- Have you migrated to one of these ATS's, how did it go, any suggestions?