I had a few software issues at first with 1666. since getting 1668, it seems to be fine, Done 1700 miles with no issues, seems to load up quickly. With 1666, it often said this is not available at the moment please wait, but dont get that now. It drives much nicer than my 7.5, glad i got the Mk8. So if you have one on order dont think you should be too worried at all