Product review (4 stars): but it's good enough to get the job done
For the most part, this is everything I needed. I wanted a way to monitor temperature in a dog kennel, garage, and outside; with an alarm to let me know if the dog kennel got too hot or cold. As others have noted, the system is not aligned out of the box, but if you give it an hour or so, all will deliver identical or nearly identical temperature/humidity readings. I wish the alarm was a little bit louder, but it's good enough to get the job done.

My only gripe with the system is that the outside monitor can't be in direct sunlight, or it will give ridiculous readings. ex) it's been in the 50s here, but each day the max temperature will wind up reading as 110-120 while it is in direct sunlight.