For a long time I was considering a Durametric for my Boxsters, but the cost, VIN# limitations, Porsche Only, and complexity kept me from going through with it.
I bought an Autel MaxiDiag Elite MD802 instead.
Autel MaxiDiag Elite MD802
It works well on a wide variety of cars and most modules.
Reset an airbag light on my '01.
Helped me diagnose a failing Crankshaft Position Sensor on the Cayenne.
Works on my wife's Honda Element and all my other OBDII cars.
Cost under $200 from Amazon and some reliable eBay vendors.
I am very happy with it.