I like the ADAudit product a lot. It has been easy to manage and deploy. Probably my biggest complaint about the interface is selecting which computers to pull the log for. First off, I don't like that it chooses a random computer by default that you have to remove with 3 to 4 clicks. Second, I think the box with the default computer in it should have a text search with a drop-down that appears as you type. This would make viewing the logs tremendously faster.
Also, when you navigate to a different page with different types of logs, it should save the previous set of computers you were looking at.
Thanks,
Daniel