I do not buy or recommend buying anything for long term use, especially no tools, interfaces and instruments used for work, that has no exact schematic, service manual and open source drivers (for computing equipment). That includes most tools and some other related things (like specialized device pogrammers used for production or prototype making). For 'consumer' devices, I do not care. The reasons are obvious, especially since many tool-type devices require explicit modification before or while they are used to make or test things with them. No data means no buy. Bad reviews wrt. inter-operability with open source tools means no buy. The only recourse is good reviews wrt. see above. I do not know what class an OBD device falls in. I guess one could say it is in the 'closed black box consumer device' class because another compatible exchangeable device would also have an OBD plug and an USB plug and go between a car and a computer. I cannot guess for you. But the attitude of tool users towards tools that break down and cannot be inspected/repaired is that they are 'c**p'. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist