Answer:

The trial version of 007 Spy has a 15 day and 1 hour session limitation. That means within the 15 days, you can run it unlimited times, but each time it will monitor for only 1 hours. After 15 days the trial version will completely stop working.

Another limitation is that the trial version does not automatically deliver logs to your email box at set intervals. But the "Test Now" button does work correctly for evaluation.