OK, here is my review.
Received my block last week. Nice timing as I was doing a brisket on Wednesday night. One thought is, these probes are thick. I just don't see myself using them for things like steak. But, BBQ is my main use of probes anyway, so can see it working here and for large cuts of meat.
Downloading the app and setting it up was pretty straight forward. Each probe is numbered 1-4 and the app can monitor all of them at once. I did notice, temps don't register super fast, it took a while to get the ambient temp close on all of them and still was never w/in 5 degrees of each other.
The advantage to the block is you can set it up with wifi and have it near the smoker/grill and monitor from anywhere. One thing to note, it auto shuts off if you haven't "started a cook" for at least one probe. Took me a while to figure that out.
I have a Weber Smokey Mountain and with the block about 10 feet away and no signal issues. My smoker maintains temps really well as I have an IQ for it. I usually just get up once at night to ensure nothing crazy is going on. With the Meater, I was able to just look at my phone and even set alarms.
For the most part, it worked well for monitoring ambient temp. I could tell the fire was still going and nothing crazy was happening. If you're OK with about a 20 degree ambient temp range, this will work well. More exact than that, I'm not sure.
One problem with probes for an entire cook is they tend to heat up, causing readings above what the meat actually is. The thickness of these probes seems to exasperate the problem. Additionally, the part that is supposed to go in the meat says to not exceed 210 degrees. I don't intend to smoke my brisket that high, but I woke up to warnings stating they were at risk and I was at that temp. The actual internal temp was nearing 200, not 210.
Overall, I think they are good for monitoring the smoker temp remotely, but not for exact precision. With the size and slowness of these, I don't envision them replacing a thermapen or similar for that.
Overall, a bit of a bust, but not a total failure. Will see how another cook goes.