I am impressed I installed the sirius connect tuner unit and the srs2 firm ware 4.38 Released 6/21/07 . Everything went text book . Worked right out of the box . In fact i had activated my unit on Friday . I did the install on saturday. I did not have to call sirus to send signal. I am guessing that once they send the signal the request must last 24 hours. When I turned sirius on for the first time screen said updating. 30 seconds later I was in business. I would recomend the new unit and firmware to anyone that has the old one and has issues.