purchased these on sale and they are great boundary mic.
as good a Sennheiser's and AT's.

We used one of these to replace a standard podium microphone. The problem with the normal "mic on a stick" is that the average speaker will pop at every "P" sound in the speech, or never move the mic close enough to pick up well.
The Monoprice Half Cardioid Boundary mic solved these problems. The pickup pattern is independent of the speaker's placement and far enough from the source to mellow out the dynamic "pop" in speech.
The caveat with these in an auditorium setting is that the half cardioid pattern may inadvertently pick up the PA system, so in this use case one must be cautious about feedback. We found 16.5 db setting on the mixing board is the happy medium in our set up.
In a conference room or even on a desktop as a "work from home" mic (audio interface likely needed here) this would do the job well without the feedback concerns.

A nice cardioid pick-up pattern. It is focused the appropriate direct for both table-top use and edge-of-stage use. Keep in mind, the size of the area around the microphone will dictate how well your low frequency response will be. The high frequency response is good and not brittle. For some uses the light on the mic comes in handy. You tell the kid performers, with spoken parts, to line up behind the light. They would have never seen the black mic on a black stage. And, for some reason spike marks don't work that well with kids. But a light they can see, with even a modest amount of stage lighting on their faces, works well. The draw back is you always have to remember to power up the microphone (push the button) after powering up the sound system's fantom power. I have already forgotten once. Overall, I find two mics on the edge of the stage does great with very little concern for feedback.

Great pickup. The downside is that you have to push the power button each time you turn them on. It would have been great if they would power on each time phantom power was applied. The other thing that is annoying is the bright blue indicator light. It is very distracting.

They work as expected. Solid build.

Finally replaced my 30 year old Realistic PZM with this and I?m very happy with it. Great value!

Sounds great especially for the price. Definitely a quick and easy way to record drum tracks.

It would probably work great in a small room with a small group sitting close, but the microphone is not as sensitive as I thought it would be. Someone 10ft away speaking somewhat softly, but clearly heard in the room, cannot be picked up and transmitted clearly.

The microphone is well built and preforms reasonably well. However, the requirement of having to go on stage and turn the microphone on in the event of a momentary interruption to the phantom power makes this microphone unusable for a performance installation. Wish there was a way to have this unit default to operational, it would then be useable.

I've previously worked with PZM series mics for videography jobs, but have been looking for something cheaper for my own use. The sale price brought it down to the range where I was willing to give it a try.
The body of the mic is solidly constructed.

I appreciate the use of a standard mini-XLR for the connector. The cable that is bundled with it could be better, as I got quite a bit of noise in my mixer when the full-size XLR end was touched or when the cable was jiggled just a bit, which doesn't happen with other cables I have, with or without phantom power applied.

The power button is quite annoying; first, the mic defaults to off, so everytime power is re-applied the button has to be pressed. Second, it seems like there's some lag time between phantom being applied and when pressing the button will actually turn it on. This was 10 seconds ish most of the time. Perhaps there's a capacitor that needs to charge, but it still seems unusual. There are already DIP switches on the bottom for filter/gain, so I would suggest adding another switch to set default-on or default-off, so that those who don't want to have to deal with the power switch won't need to.

I didn't get a chance to extensively test source material. It's definitely cardioid and not omni. Sensitivity is a bit on the low side for a boundary condenser; if your mic preamps don't have much of a gain range you might find it a little quiet depending on what you're trying to capture.
Normal talking sounded natural. I can't comment on other applications, and I didn't do a frequency sweep to confirm the response range (yet).

I don't have a quiet enough space to test self-noise, but there wasn't an obvious issue there (no "waterfall" noise from the mic electronics when its on).

If you need a low-profile mic to put on a table to capture talking at relatively close range, this will do the job. You're not going to adequately be able to cover an entire conference table with a single unit, however at this price multiples would work fine. The cardioid directivity means they would be pretty good for amplified scenarios, as you'd not have to worry as much about feedback. They're sturdy enough to survive some drops. They're reasonable for the money, at the sale price at least, and would be easier to recommend without the power button quirks.