ProsMostly straight forward driving monitoring deviceEasy to install thanks to the OBD port lookup in the android appCell-based data transfer so no need to remember to connect via bluetooth on your phone and sends alerts in real-timeConsInherent privacy issuesConfusing appFeels like a beta device for the consumer during both the set up stage and anytime when looking on their website for support articlesPossibly drains the battery of the car far faster than it should (left my car parked for 3 days and received notification the battery was low)Final verdictLimited functionality, $99 yearly fee, and privacy issues make the Zubie Key a niche item that the target audience, concerned parents of teen drivers, will truly appreciate.All the RestPrivacy: There is already a heated debate about the privacy issues surrounding this item so for that I would refer anyone to the privacy policy and the comments on so many of the other reviews.Set up: Initial set up went smoothly enough although due to the dumbed-down approach they use there is little to tell you that while the initial set up happens on the first drive, the vehicle is not actually added until the next day or later.During set up it allows use of a smartphone camera to scan the serial number and activation code to set up the device, but i could not get it to scan the vin (tried both the dash plate and the # and barcode on the registration card)Once everything was set up the operation was mostly seamless, the app tracked my journey, showed on a map where I was accelerating rapidly or braking hard, how long i idled, and my top speed. The app itself was confusing to use as some of the information would be under a subheading in the menu that was not immediately apparent, ie old trips seem to have disappeared after a day or two but could be found by going through 3 menus, after two days of not driving that particular car (the key is still installed) the app has forgotten that I have a car set up, although I did find an engine and battery alert notification that when selected show no information.Just to test the tracking abilities I went to a private lot in the snow and spun the car around, when i checked the app later that day it did not show any alerts related to that so presumably your teenage drivers could still be getting away with hooligan behavior and you would never be notified.The battery in my car is not all that old and has never had any issues so i was quite surprised that after about a week of being plugged into my car (the last 3 days I did not drive it) Zubie notified me that the battery was getting low. I had previously seen that other reviews mention similar things, hopefully this will be addressed in an update soon.Finally I found that on my particular car (1999 Mazda Miata) the diagnostic port that the Zubie app so helpfully located for me was just underneath and to the left of the steering wheel, but due to the size of the key i had to remove and store the diagnostics port cover which is also the fuse block cover.