So I bought the 500 series from BEST BUY and it indicates it's suppose to come with a 5QT bowl...however, mine came with a 6QT bowl...which caused the dough hook not to work properly with my machine. My machine initially made noises..i called and complained to kitchen aid..they just sent another attachment to me which didn't help either. Well now my machine stopped working and i believe it's because BEST BUY sent me the wrong bowl with my machine which caused it to die. MY machine didn't even last 2 years. SAVE YOUR MONEY. It isn't worth 500 dollars.