open source reporting

[Alex Dean]

Is anyone on this list familiar with JasperReports (www.jaspersoft.com) 
?  A company I consult for is headed toward Crystal Reports for their 
reporting needs.  I know it's a major product which will probably do 
everything they want, but it's also (as far as I know) a Windows-only 
proposition.  Jasper is open-source J2EE, and seems to offer lots (maybe 
all?) of the same features.  I'd like to hear from anyone who's used 
either product, but especially from someone who's used both and could 
compare.

thanks,
alex