I used TimeSlice back in OS9 and found it to be a comprehensive time tracking tool. However, there are two problems I have with TimeSlice 3:

1. If you havea timer running, it hogs 5% of your CPU, even when it's in the background. If you're just running Word or something in the foreground, not a big deal. But if you run CPU intensive apps at the same time, that's an awful lot of overhead to give a timer. Minuteur uses about 1.5% CPU when a timer is running.

2. More seriously, the built-in summary (report) window is not very useful because it won't list tasks by project. It just shows all time for a given project, and then all time for a given task (even if it is across several projets). If you use a spreadsheet or something else to actually generate your invoices or do your project management from the TimeSlice data file, then you probably won't find this a limitation.

Finally, the developer is helpful in some ways-- issued an upgrade coupon to upgrade from the old 1.x version to 3.x. But when i tried asking about the summary format on the forum, I got several "You're posting in the wrong section" replies instead of some actual effort to understand the issue and suggest a solution. So I was rather disappointed by that.