We went through a fairly long evaluation process and ended up with
Standard Time - which is far from perfect but closer than anything else
we've found so far. Key issues for us:

- Quickbooks interface
- Central database
- Must be able to handle offline mode for tracking time when people are
working disconnected (we do a lot of work with people in client offices
via laptops, can't always get to our servers over the net due to idiotic
security restrictions)
- Some sort of stopwatch/timer mode (people are not reliable when they
have to record time on their own or remember it after the fact)
- Security at least on a user/project basis

Given the number of commercial products out there, I'd love to think the
perfect system exists, but if it does, I haven't found it.

Mike Gunderloy
http://www.larkware.com