A must have tool / Innova 3160

From the early 80's on I have had scan tools.
Older ones you had to count the check engine light flashes to get the code number (still have mine for ford / gm / chrysler). I even went as low as to use a paper clip to get the codes.
Then I started with my first OBDII and it was very good (had to look the code description up in a book)
Now with the CAN OBDII and error code description on screen it is a must have for anyone.
This model with the ABS is a nice little touch also.
Even if you don't repair the car yourself, knowing the code & description before going to a garage allows you to know what is wrong and if they are telling you the truth or not.
Leaving the gas cap off after a fill up and having the check engine light come on can cost over 70 bucks to get the car computer reset, only a few seconds to reset with this. (some newer cars / vans don't automatically reset like the older models cars did)
Best of all, after you repair your car being able to use the OBDII tester to verify the repair is nice.
A would say a must have for beginner / hobbiest / professional.