Note: This review is based off of the app version 1.0.4. My subsequent updates to this review will state the version current at the time.The Automatic Link certainly serves its intended purpose; it tracks your driving behavior and allows you to view it along with some comparison information, which can help you change your driving habits to improve gas mileage and save money. If your Check Engine Light comes on, it will alert you, along with a description of the actual problem, and it will optionally contact emergency services if you're in an accident and notify your selected emergency contacts as well.The initial setup of the unit took me a little while, but my experience may not be indicative of your own. The first couple of steps had me plugging in the dongle after downloading and running the iPhone app, entering the serial number of the dongle, and creating an account. After this, I was told to start the engine and wait for the phone to recognize that I had turned on the ignition.  Well, it never did.  I tried a number of times, turning the car off and on, closing and reopening the app (including force-quitting from the task manager) and nothing would work.  The app suggested that some vehicles may need to drive a short distance before the signal is picked up, so my next time out I tried again, and after 12 miles it was still having trouble.  Finally I restarted the app and started the install process again from the beginning, and it worked right away.The top portion of the app shows you your stats for the week, including total miles, total fuel cost (based on average gas prices in your area), minutes driving, average miles per gallon, and a "driving score" based on your driving for the week.  The driving score starts at the maximum 100 and changes depending on your hard stops, hard accelerations, and how often you drive over 70 mph. The idea, of course, is to try to keep that score as high as possible, and in doing so improve your driving habits. Audible alarms for each of these will also let you know when you're doing something "bad". If you are actively trying to increase your score, you'll quickly see how your thought process changes while driving.  For example, when you start getting hard braking alarms every time you come up to an intersection or when someone in front of you hits the brakes, you'll start to think about reducing your speed earlier or increasing your following distance so you don't get the alarm. It's effective, as long as you care about your score (or at least, as long as you want to stop the thing from beeping at you).The center portion of the screen shows the current parked location of the vehicle. Clicking on the map makes it full screen, and adds a "current location" dot so you can find your car in relation to where you are currently standing. The map supports pinch zooming.The lower portion of the screen is a timeline view that shows you a list of each of the specific trips that made up the totals in the top half. The unit defines a "trip" as everything that happens from ignition on until ignition off. You can scroll through the list of trips to see each one's time of day, destination street, total distance, fuel cost, and number of hard brakes, hard accelerations, and times over 70 mph. Tapping a specific trip in this list shows all of this same information but also brings up a map showing your exact route as well as a comparison between your MPG for that trip and the EPA estimate for your specific vehicle.So here's what I like and don't like about the Link.Like:- The app is beautiful. Very well designed, easy to use, smooth and responsive.  It feels great to maneuver through it.- In the timeline view, when you select a trip to view details and see the mileage vs. your car's EPA estimate, the estimate takes into account the roads you were driving on. For example, my Jeep Wrangler's EPA estimate is 15 city, 19 highway. The app knows this, and so trips that are all city driving compare my mileage against an EPA estimate of 15 mpg. All-highway trips compare my mileage against an EPA estimate of 19 mpg.  A trip that's 80% highway and 20% city compares my mileage against an EPA estimate of 18 mpg.  Very smart.- Support for multiple drivers and multiple cars.  You can add additional vehicles to your account, and add drivers for vehicles.  The parking location of the vehicle is synchronized between multiple drivers for the same vehicle. Each driver for a given vehicle maintains a separate list of trips, ensuring that your mileage stats are yours alone, not shared with someone else.- An active website with plenty of customer communication, where the team is listening to the requests of users and telling people about planned updates and upcoming functionality.- Check Engine Light information includes not just the cryptic code, but a brief description of the problem, and possible solutions to the problem.- The parking feature records your location at the time ignition is turned off, so you don't have to manually open the app and set the location like you would with any other "Where's My Car?" type apps out there.Disike:- As of v1.0.4, there is no support for real-time driving statistics. When driving, you see "Currently Driving..." with no additional information until your trip is over. It would be nice to see instantaneous MPG (the Jeep only shows average MPG in the dash, not instantaneous) and some other data. However, there is information on the website stating that real-time data will be available in a future software version.- Currently there's nothing you can do with your score, which could possibly reduce interest in maintaining it. Once you have used the unit to learn how to adjust your driving habits, there doesn't seem to be much incentive to KEEP using it.Overall, it definitely does work as advertised, and it does it really well. I'm looking forward to the app updates and added features, and I'll update the review accordingly when the time comes.