The OBC v2.0

Had high hopes for this product , but to be honest , very disappointed in what this unit says it does compared to what it actually does ? The only functions that work consistently are the time & date , the outside temperature and the volt meter . The gps speedometer takes between 20 - 30 minutes to locate a satellite to lock onto , the fuel consumption , the range never ‘remember’ what it’s done on previous journey’s ?? And always start eventually from zero . The altimeter and the heading functions again only work after you’ve been travelling for some time . And i have the scroll function indicator stalk on my E28 but all this does when you press it is reset everything to the factory settings ? Seller says a software update is coming to resolve these issues but hasn’t said when that might be ? So i’m going to put my old OBC back in my car .