Four years plus and it still works! I got this to control my master bedroom fan and surprise it still works. Below is the details of this awesome piece of work.What I like About It (All of it):- low battery consumption (mine runs on rechargeable battery and only charge them after 8-12 months)- current room temp indicator (bonus)- The convenience all below:- 3 fan speeds- room temperature based auto on/off function (if room temp =: 8 degF above setting means Fan-High, 4 degF, means Fan-Medium, same temp means Fan-Low and temp 1 degF below setting means Fan-Off i.e room is 1 deg colder already)- fan and light off timer (0.5, 1,2...up to 24 hr range)- dim function (100% to 20% range)- exit light off (3 minute timer)- during installation: - easy mounting of cradle to wall or in my case a switch plate - Can be repurposed: - multiple around the house independent units capable (make sure you make a list of the frequency no.) - cloning or making one controller for some common areas is possible (although not advisable)What I don't like about it:- None (this is not designed for regular non-dimming CFL's or LED's such that when dimming they flicker and reduce bulb life)What to watch Out For:- may not work with some dimmable bulbs (best to test the bulb brand for a couple of days to a month)I wish it Had:- glow in the dark button for the light (I modified it to have one- green dot on pics)Here is How this works/adjusted (the specs): (See pictures for buttons and display) >Regular buttons: - fan On button (turn on and adjust fan speed) - light On button (also dim button- holding it down; once it reaches the bottom dimmest setting it goes back up to the brightest 100% and then goes back down and so on...) - light delay (I call this exit light off- if pressed, light remains on and then auto turns off in 3 minutes) - fan auto (to switch to manual and auto) (see above like how this works) >Setting buttons: - fan timer (when setting hours to run fan on timer) - light timer (when setting light hours to run on timer) - up and down (for setting hours and temp) >Display indicates: - set temp (to keep fan on when current room temp is equal or higher than this, fan turns off when current room temp is below this) - current room temp (the chip inside the controller compares the set temp to current temp when on auto mode; this also is a good visual aid when trying to find out current temp in the room compared to other rooms in the house) - fan on state based on the 3 speeds (low, medium, high) (blue button to adjust) - light dim state in percent (%) (yellow button to adjust) - fan auto/manual state (fan auto button)Important Tips:1) If you have multiple fans or have pending installations, interference and duplication is avoided by changing the frequency switch before installation, make sure you make a list of rooms versus frequency no.for reference to save time in installation troubleshooting a duplicate signal.2) Change bulbs to dimming CFL's or best to LED's to eliminate flickering. (We all may upgrade at some point.) Make sure to test the best brands available in your area (for a period of time) prior to bulk purchase. 90 Day return policy on most stores will serve this purpose.3) Bulbs of different brands are made different. When it comes to dimming with whatever dimmer switch, the bulb needs to be tested for compatibility.What I did:I upgraded/changed all my bulbs to LED's during thanksgiving last year (specifically GE brand and dimming is no longer a problem).In Conclusion:This is one great investment useful, reliable and durable. The auto fan function may serve its purpose well for house climates that change temperature up to 9 degF range (High to Off setting). It will work as described. Some compatibility with available dimmable CFLs may need verifying and this is not the fault of this unit. YMMV on battery life if you have auto function set up and timers set frequently.This review is based on my personal experience. It is my personal goal to help fellow customers when I think a product is worth the money and time or vice versa. When I am happy about a product performance and it was helpful to me, I can take time to tell people so hopefully they can benefit too! I rely heavily on reviews prior to making the "BIG DECISION" of buying any product be it for a project, repair or accessories. "I believe that any penny spent is not worth spending if the product is not the right one in the first place." With this in mind, I try to find ways to assist where a shopper can find if the product may suit their need. Likewise, posting reviews on products I own and use is my way of giving back to the owners/contributors who have helped me find the right product. I hope this review proved useful, if so please click "Yes" below.