Had a similar model that was probably three years old for my home TV needs and it lost signal through a couple channels. After a bit of troubleshooting just decided to get a new one. Installation was easy, just replacing in kind with same inputs and outputs. The most convenient thing for me is the IR remote signal frequency is the same as the old unit, so my universal remote signal wire that hangs in front of the unit didn't require any reprogramming. All signals worked so assume old unit failed for some reason. Other than concerns about longevity of the unit I have no complaints, works well for my needs.

Pretty simple device, 4 inputs in back along with 4 outputs. Comes with a small remote to select your combinations - I have never used the remote though as I have a universal remote for my system.

I bought this to be able to switch a dual monitor setup plus a third monitor between two computers. They're all 2560x1440 monitors, so I put the EDID DIP switches to 1100, Copy Output 1. This way, the computers both see 2560x1440 for both monitors.
The main dual display setup is OUT 1 and 2, the third monitor is OUT 3 (it's located directly in front of my steering wheel for driving games), and OUT 4 is empty.
IN 1 and 2 are the main PC, and IN 3 and 4 are the second PC.
To switch, on the front panel, I tap OUT 1 twice (to go back and forth between IN 1 and IN 3) and OUT 2 twice (IN 2 and 4).
It only takes 3 or so seconds, and then the display's up.
Critically, both computers always think they have the same 2 displays, so none of my windows get screwed up.

I use a separate USB3.0 switchbox for keyboard/mouse/etc.

Been doing this for a few months, and it's rock solid. Gets a little warm, but it's a solid metal case with no fan, so that's not surprising.

The remote works, but the front buttons are much easier for me to use constantly through the day.

I've been very impressed with this 4x4 HDMI Matrix. I have only used it with 1080p sources, but everything was self-explanatory as far as setup out of the box and operation goes. There is no noticable lag for playing video games.

All in all, this is well worth the price!

I just purchased my 8th Monoprice Blackbird 4K 4x4 HDMI Matrix for my video studio. I integrated it today as the switch between the camera & the monitors and also the PCs with the recording software.

Fired right up and the picture off my 4K video camera was outstanding.
They also made the unit more compact which is great as it is placed next to my camera. They took off the manual on off switch and the remote is now required for power up & down.

Works great

This unit actually works with 4K. The validation takes place flawlessly across any number of source devices to display devices. It handles all the variations of HDR accurately also.

This is my 3?rd HDMI switch over the past few years. This time, the technology ( affordable technology ) has come of age.

This is a great unit - go for it !

The 4x4 matrix switch works as expected. The remote control is much better than the small remote that comes with the 4x2 matrix switch.

The only issue I noticed was that half the pages in the printed users manual were blank! Among the missing pages was the one that explained the positions of the DIP switches. Of course this caused no actual problems since the user manual can be downloaded.