Product review (5 stars): I'm pretty happy with this
Straight out of the box, I have the two sensors literally next to each other and they seem to vary 1 degree from each other on both temp & humidity after about 15 minutes to settle in.  After reading so many frustrated reviews, I'm pretty happy with this.  It seems reasonably well built and for $20, has the build that I would expect.  No frills, just straight forward doing its job.  I'll come back to this review & update if it fails prematurely.

It DOES have min/max functionality even though it doesn't describe that so well in the description.