Summary: This printer has consistent issue(read other blogs) with printing when it has been in sleep/deep sleep mode. (contrary to what the manual states). It will work eventually however. Using the keypad is not very intuitive for the basic person which contributes to the problem. Also, it is fairly noisy but not unbearably so.
Excerpt: We have spent more money replacing drum units than the original printer cost. Don't be fooled by the purchase price. Maintenance costs make this a very, very expensive printer. Brother support won't do squat because they say replacing the drum unit is a normal wear and tear thing. However, our prior HP was a freaking work horse. Never had to replace a drum unit with 100K+ pages printed.
Excerpt: Last week I purchased the Brother 5470DW printer. The printer is causing my electric circuit to fail. There are many other reviews that have stated the same issue with your printers. I was planning on returning the printer soon, if I cannot find a solution. Is there anything that can be done to reduce the power output of the printer?
Excerpt: This printer worked beautifully for 2 days then it started printing completely black pages then it simply stopped printing and started flashing a message to re-start printer. I restarted it almost 20 times and the message is still flashing. Returning it today.