Very happy with the 2017 Volt, disappointed with MyVolt's reported/downloaded charging and mileage feedback due to inaccuracies, discrepancies, and gaps. Before posting a litany, I thought I'd ask the forum whether others have experienced issues recently and whether the problem lies with the Volt's data collection and storage, or are limited to the retrieval and presentation software. The latter can most kindly be termed a work in progress. Is there a third party device (eg an OBD2) can be plugged in, say one a month, to extract dependable raw charging and mileage data, for independent review and analysis on a Windows laptop. Thanks