I posted this review over on the Big Green Egg BBQers Facebook group and thought I'd post it here as well.  I included several pics at the bottom.

Full Disclaimer: I was a beta tester for Smobot. I purchased my beta unit at their suggested cost of the unit and used it regularly for several months. I worked with the two owners/developers to test new firmware/features. I then purchased a new unit through the company’s kickstarter to replace my beta unit. I am in no way paid by the company. I am a big fan of the device and use it with my BGE more often than not for cooks under 600 degrees (F). I also have never used a competing product.

Introduction: You can find out about the Smobot on their website and recently opened store here - http://www.smobot.com/. The smobot controls the temperature of your grill by adjusting a modified daisy wheel on top of the grill. Unlike some competing products, there is no fans or forced air systems to control temperature. The retail unit comes with the modified daisy wheel with motor, the control unit, and grill temperature probe, two food temperature probes, an AC adapter. Note - the pictured battery pack as only included for kickstarter backers.  Sorry for any confusion there.  The unit is powered through a micro USB connection either with the included AC adapter or a USB battery pack. Note: not all USB battery packs are compatible due to how the power can fluctuate out of various units.

Setup: Similar to other IOT (Internet Of Things) devices you may already have in your household. You essentially log a computer or phone onto the control unit’s wifi to configure it. In doing so you will connect the unit to your home wifi network to allow remote monitoring and control through http://mysmobot.smobot.com/. I use mine on my large Big Green Egg so the daisy wheel modification may be specific to my unit but I would assume it’s similar to other kamodo grills. Basically you unscrew the top of the existing daisy wheel off of it’s base and replace it with the smobot modified daisy wheel and motor. I’m relatively technically and mechanically savvy so found setup very easy but the instructions are very clear and easy to follow for just about anyone I would think.
To use on the grill, you simply place the modified daisy wheel back on top of the grill and open the bottom air intake all the way (I sometimes only open half way for low temp cooks - no reason). You then use the alligator clip to attach the temperature probe to the grill. Connect both the temp probe and the daisy wheel motor plug to the control unit. Connect power to the unit by AC adapter or USB battery pack to power the unit on. If everything is connected correctly, the daisy wheel will cycle open and closed and the screen will show the temperature of the grill probe. Obviously if you are using food probes you would connect those as well.

Use: Though I cooked dozens, if not hundreds of things on my beta unit, I wanted to cook 3-4 different types of cooks on the new unit. You can use the unit anywhere from basically as low as possible (I’ve done 185 with the beta unit just to test) up to 600. So far with the retail unit, I’ve cooked some pork butts at 250, some ribs at 250, chicken fajitas direct at 375, pizza at 450-500, and some chicken quarters indirect at 350. In all cases the temperature held rock solid at the set temp, only varying when I opened the grill to adjust or check things. Because the unit is designed to get to set temperature with very little to no overshoot, it may take a bit longer to get there then if you did it manually. I do find, I guess not surprisingly, that though it may take a little longer to get to set temp, I don’t have to fiddle with it as much to get it to hold temp. This may seem trivial and super obvious but when I have a group of people coming over for brisket or pulled pork it sure is nice to not have to worry about the grill drifting off temp or how long it will take to get stable.
While cooking, you can check progress through the mysmobot website which now auto-refreshes. You can also change the set temperature remotely through the website. One thing that is missing though coming soon is the ability to set alarms on the set temp and food probe temps. They also don’t have IOS or Android apps though those are on the roadmap as well to my understanding. To me these will be “nice to haves”. I’d be happy to update this review when those features are released.
Overall, operation of the unit is virtually silent. If you’re right next to it when the daisy wheel damper is adjusted you can hear the slight whine of the motor but that is it. It also seems to use slightly less charcoal than manual, likely due to less temperature overshoot and adjustment. I might just be really bad at manually temperature adjusting my egg though 

Final Thoughts/“Should I buy one?”: For me, the smobot was a game changer. Bottom line, I cook more often on my egg because of it. While my wife likes to refer to it as “lazy bbq’ing”, I prefer “smart bbq’ing”. Many times I’ve been able to get the grill setup and cooking, then go run errands, take a nap, sleep through the night, etc. - all with peace of mind that my cook is going smoothly. I also like it for simple mid-temp type cooks where I can get the egg setup and lit, then go inside to prepare whatever is going on the grill, and not worry about where the egg is at or if it has overshot my desired temp. I know there are BGE folks that swear by the stability of their grill for slow and low cooking and consider temp controllers a waste. This is probably not for them. I”m at the stage in my life where I generally make “optional” purchases that make my life easier. The smobot definitely makes my life easier. I love mine and would buy another in a heartbeat.

I'm not a professional product reviewer (please hide your shock and surprise . . . ) so please let me know if you have any questions, comments, or concerns.