Summary: I really wanted to like this printer. I had a Brother laser printer in the past that worked great but gave it away when I was moving (what a mistake :). I bought this based on my past experience, but should have trusted the reviews complaining of tripped circuit breakers. My house has all brand new wiring, and I even tried putting the printer on a circuit all by itself, and while sometimes it would go for a while without tripping the breaker, if it had been in sleep mode...
Summary: What I needed: a simple, 2-sided, functional laser printer to send to my parents to work with their new Chromebox. I thought this was that printer. It turns out, it doesn't work. Problems I encountered: - Turn it on. The house's circuit breaker pops. This printer has a power-spike on power-up, and doesn't work on 15-amp AFCI protected circuits. Moving it to another circuit fixed this.
Summary: I bought 3 of these printers and each time they tripped the circuit breaker in my home office. I had nothing else on the circuit and I tried 3 different office circuits. A different circuit breaker tripped each time. The room was wired as an office with extra power in mind. I returned the first two printers after seeing other Amazon reviews of this product and reading about tripped circuit breakers. I then noticed something about my office circuit breakers.
Summary: Just like many other reviewers said, just powering the thing on trips my house circuit breaker. Right after unboxing. I tried powering it on twice. Maybe printing trips the breaker too. I have no idea--I couldn't even get it powered on. Went straight back into the box for return to Amazon.
Summary: Unless you're printing single page documents, this printer is really aggravating. It prints in reverse page order: page 1 first - print side up, then page 2, then page 3, etc., so you have to re-order the job every time you print. I called Brother to see if there was a way to fix this, and they claimed that the print driver was not able to alter the print order.
Summary: We moved to a new house, in which I had specific circuits designed and built-in during construction just for the computer systems and electronic equipment, and the home entertainment center. Whenever this printer starts to try to print, it trips the circuit breaker on whatever circuit it is on.
Summary: As other reviewers have said, this printer has a power problem when it starts up initially (and apparently every time it wakes to start printing but I can't comment on that because I never got it booted completely) by drawing enough amps to trip a 20amp circuit breaker. I tried three (3) different outlets, on different circuits, all with the same results. When I powered it on, it would start to power up and then within 3 seconds trip the breaker.
Summary: Liked the speed and wireless networking; too bad it couldn't print more than one page at a time without notching the paper and spitting out blurry print. Didn't have a problem with it blowing the fuse but I could detect a slight burning smell every time it fired up (excuse the pun). We promptly returned it and plugged our old printer back in. We currently have the HL-5250DN. It's a tad slow, without wireless, but it's been a real workhorse.
Summary: I'm on my third Hl-5470 DW in three months. There's a defect that reduces the printing speed to 10-15 ppm. This has happened on three different machines, starts out fine, then printing function fries and turns into slowest printer ever.