Product review (4 stars): Nice little sensor!
No major complaints on this one. It does what it says it does, easy to work with, and had it up and running on an Arduino in minutes.

One thing to note, the DHT11 is a fairly slow sensor, so it takes a couple seconds to read temperature and humidity changes. Not a big deal for my attic fan, but if you're looking for a real-time sensor, this isn't it.