SBO 2007 final release, any compatibility issue with Office?

Is SBO 2007 final? My client uses XLReporter a lot and I read some compatibility issue with Office 2007? Should my client stay with SBO 2005 -or- go ahead and upgrade to SBO 2007? I read in the forums, some are praising SBO2007 (the best SBO ever) and some said there is no major improvement on SBO2007?

Any suggestions?