Programs like Autodesk Inc.'s AutoCAD, Napster and Starcraft Broodwars receive a rating of 5, which means they run almost perfectly. Not all reports end as well. Some users can't get Microsoft Word running. Others find strange glitches. Text was small and highlighted in blue, no graphics were shown for this document.
Many reports fall in between.
I don't use the Web or inventory stuff or the address book, just use the accounts and some reports. Wine developers use these reports to decide what to work on next. Often, the people who find a bug are the ones who try to fix it. And each contributor has a personal reason for being on the project. If I can get that working, my wife and I would be quite happy to never boot Windows again.