has anyone used one of these readers.... seems to be genuine and would save from massive fees charged by dealers and garage just to find is a simple fix or somethings come loose to then be charged to clear fault...link to item https://www.ebay.co.uk/itm/Fault-Co...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649 wanting some help if wise to purchase or give it a wide birth.....