Reporting tools

["John Parker" <jparker () powertel com>]

We are currently evaluating several reporting products that take the
checkpoint log files and use that information to give us reports on
bandwidth usage, top 50 websites hit, top 50 internet users...  We're also
looking for peak usage hours, peak days of the week, etc...

Are any of you using anything like that?  Before I mention what we're
looking at, I'd like to get some unbiased opinions.  What are the pros and
cons based on the tools you've used?

Thanks in advance.