Our entire deep tech nonprofit team across several US states uses Chromeboxes, and when we travel for work we use Chromebooks. They are powerful and economical. We use both Acer and HP. This is our first Asus Chrome product. We were SO excited for this ASUS Chromebox 4 and have been waiting for months for it to come out so we can try it. This one can handle 3 monitors! And we love multiple monitors. So we bought one to try out. Here's our report:PROS:1. It really does handle 3 monitors. Awesome!2. It's just as fast as our other i7-processor Chromeboxes from ACER and HP, if not even a little faster, though that may just be new-computer excitement bias.CONS:1. No keyboard or mouse comes with it, which we knew in advance, but still disappointing given the price.2. UPDATE: I returned the previous unit that was squealing [see story below], and got a new unit. The new identical Chromebox works perfectly and does NOT squeal when a USB peripheral that pulls a lot of power is plugged in. Which means the first unit I received was defective. So I recommend checking your Chromebox as soon as you get it for this issue.As far as customer service goes, Walmart's order was also meant to be fulfilled by a third party vendor, just like here on Amazon. But the third party vendor to Walmart.com canceled my order after a long delay, likely because right after I ordered it the price jumped a lot higher and the vendor didn't want to fulfill low cost orders. Walmart was unable to honor the original price I had ordered the unit at, since like Amazon, it was being sold through a third party, but unlike Amazon, Walmart tried to make it up to me and gave me a coupon code for anything we wanted at Walmart.com, which I promptly used. So I came back to Amazon for the Chromebox since Walmart vendors' prices were now more expensive than Amazon vendors' prices, and I had to order the unit at a much higher price in the end than I had originally paid for the defective new unit. Very disappointing. No coupon codes were given to me from Amazon to make it right (see description below). So Walmart still wins out on customer service over Amazon, even when third party vendors are involved. And Asus needs to consider doing better quality assurance on its Chromeboxes before shipping them. Capacitor squeal is something they should catch easily.[Previous story that was updated above: Our brand new Asus Chromebox 4 squeals! Like a constant high pitched mosquito on a camping trip. Needless to say, it's unbearable to sensitive ears. After a half day spent trying to figure it out, we're going to send it back to Amazon and re-buy from Walmart.Here's what we did and why we're going to buy from Walmart instead:New Asus Chromebox 4 arrives and sits in shipping box for a couple of weeks till we had time to set it up, which was this week. We set it up like normal and updated the OS twice till we got the current OS. Then we plugged in all the peripherals that we were using moments before on one of our Acer DT.Z0TAA.001 Acer CXI3 Chromebox Core I7-8550U 1.80GHz 16GB 64GB SSD units, and immediately the Asus Chromebox 4 gave off a faint and ongoing squeal!!! We gave it a day, and it kept squealing. The we called Asus, who said "not a known issue. So do a factory reset and if it doesn't fix it, have Amazon replace it". So we did a factory reset and that didn't fix it. So then we did a LENGTHY customer support chat with Amazon online asking for a replacement, and after an hour, and two more Amazon instructed powerwashes, (which of course were unnecessary because we'd already done the factory reset with Asus), Amazon said "we're not the seller, just the distributor, so we can only return it and refund." But we said: "We just want a replacement since we think this unit is bad. The price has gone up already so we don't want to refund and re-buy, we just want a replacement." Amazon: "So call Asus back and have them replace it under warranty." Okay. So in the meantime we had dug deeper and tried different USB peripherals. Problem identified: Any USB peripheral that draws more power than other low power peripherals causes the squeal, even when every other USB peripheral is removed. For example, a tiny USB powered sound bar causes squeal, as does a tiny USB powered external drive. But USB powered mouse and webcam do not cause the squeal. Some more googling, and we discover "capacitor squeal": "Capacitor Squeal is actually the noise heard when a capacitor is about to fail." Not good! So we call Asus back on the same case number, and explain that we think it is capacitor squeal and the new unit should be replaced under warranty. So Asus says they'll repair (not replace) if we pay for the shipping to their factory, and wait 7 days up to a COVID-undetermined time for repair! So Amazon won't replace since they're only a distributor, and the manufacturer won't replace, because they don't have to. Arg!This is a customer service disaster!So this is what we're going to do. I'm hoping that this issue is just a random bad capacitor on the new unit, and that a replacement unit will fix the problem. (I'll update once I get this figured out). But Amazon has been too hard and too frustrating. So we're going to return it to Amazon for hopefully a full refund, and never purchase big ticket items like this again from Amazon. Then we'll go buy the same unit from Walmart.com instead. At least then if there is a problem I can walk into a Walmart store and figure it out.I'll update when I discover whether or not the capacitor squeal thing from the USB peripherals is unique to this unit, or happens again with a different unit. SEE UPDATE ABOVE.]