I received my Riva 510 today from Liberty Flights. I am very pleased with the unit overall but LF shorted me the USB charging Cable so that pretty much makes the kit unusable. I was not pleased with the slow response from LF "support" with some questions I had before making the purchase and I now can't contact them until the first of the week with this issue. Perhaps, and hopefully, the email I sent today will get a quicker respons than my previous emails. I tried to call but got a machine. I ordered a cable from cignot and hopefully it will be here by the middle of the week.