Fan Switch only review: So far, I have installed four of these smart switches for fans. GE recently changed the model (new # 14287) so that there are three (not so distinct) settings as opposed to a continuous adjustment (aka dimmer). Each position is denoted by the rate at which the LED flashes. There is NO tactile feedback when you move the speed setting. Thus, you need to pay attention to the flashing light. This can be a learning curve for the those people who have not used these (GE Z-Wave dimmer) switches. As my latest installs are at a house still under construction, I have not yet paired,or used them with a smart hub. The planned controller hub is a Vera hub. The older style fan switch (GE # 12730) adjusted the fan from zero to 100% speed. On some fans this was a problem as the motor needed to operate at a specific speed/voltage, otherwise the fan made a buzzing noise. But, it was easy to adjust the fan speed when controlled by Alexa. For example: Alexa, set bedroom fan to 40%. I have two of these switches installed using a SmartThings controller coupled with Alexa. GE Z-Wave On/Off switches: 12722, 12727 These are great for creating smart circuits. I prefer using the paddle type over the toggle, I have installed both. I found some of the toggle types don't seem to line up with face plate holes. These can be the master in a multi switch circuit. GE Z-Wave Dimmers: 14294, 12729 Same comments as above. In addition, you may have to educate the end user on how to set the dimmer. It may not be intuitive, particularly the toggle switch. These can be the master in a multi switch circuit. GE Z-Wave Dimmers: 14289 (Edit 1/21/2019) This is a new model dimmer switch that uses a smooth face. You tap the surface for on/off and drag a finger for dimming. An interesting design, yet, I find that it falls short in execution. One tap executes on/off. When you raise your finger to and retouch the switch for dimming, or just touch it to adjust the lights, the go off! My first install has been pretty frustrating. (Edit: 2/6/2019) The female occupant in this house absolutely doesn't like it. I expect to replace it soon. GE Z-Wave Add-On: 12723, 12728 These switches are used as part of completing a 3-way, or 4-way circuit. They are NOT stand alone switches. They MUST be used in conjunction with one of the above switches (not the fan switch). When converting a 3-way circuit from analog to digital, it can be tricky. If you are not comfortable with doing this type of work, hire an electrician. And, one that understands how to install these switches. These add-on switches require a neutral and a trailer wire from the master (where the load is located) switch to function. ALL of the above switches require a neutral wire to function. All of these switches require competent electrical skills to install. However, if you plan to convert your home or office to a smart home, and want the least amount of transition issues and the most out of reusing existing wiring, these are the best bang for your buck. I had no pairing issues with any of these. I do recommend that when pairing, add them one at a time, and name them immediately, or it is easy to mix up switch locations. Edit 2/9/18 - 14289 Smooth Dimmer switch only -- OK, the frustration level has exceeded my patience level. This switch gets removed and replaced TODAY. This idea looks cool but is ROTTEN in execution. The wife has long been frustrated, and my patience is gone. DO NOT buy this product Smooth Dimmer #14289! Every time you touch it, it turns on/off -- it is almost impossible to control as a dimmer. Your best bet on controlling the dimmer level is to use Alexa or an app. GE -- go rethink this one!