Update : 9\/13\/06 - excellent customer service if you be willing to wait online for 30 + minute -- my unit be perfect -- suction cupdid not hold on the windshield nor on the disk provide for the dashboard . they be send I another mount device at no charge . original review August 2006 : receive the unit just in time for a trip to the mountain . enclose instruction incomplete and hard to decipher for a first-time GPS user . contents in package not label or describe -- you be on you own to figure out what the disk with the red bull eye might be use for . plug it into the cigarette lighter and attach the suction cup to the windshield as instruct , turn the unit on and it work perfectly , right out of the box . the suction cup mount fail every time soon after attachment , no matter which part of the windshield to which it be attach . finally decide that there have to be a better way to mount this . on the way , two hour into we trip , hold the gp because it be not stick to the windshield , a low battery indicator come on , despite the unit be plug into the cigarette lighter -lrb- not the source of the problem -rrb- . finally , the screen go blank and would not come back on , obviously , this unit be either defective or not charge . at we destination , I figure out that the black disk with the red bull eye be actually a platform upon which to attach the suction cup of the unit to the dashboard . unit inoperable , but attach . get back home after trip , call Garmin . after 50 minute on hold -lrb- thankfully I have a speaker phone -rrb- a technician have I connect the unit with my computer & the usb cable . he inform I that my unit could be charge through the usb cable -lrb- not in the instruction book or the online download manual -rrb- . we figure out that the charge cable for the Garmin & cigarette lighter connection be defective . Garmin send replacement cable -- which I be now await . Garmin 's website with faq 's do not address query include `` low battery '' , `` blank screen '' , and so forth . I can report that during the two hour it do work , it be marvelous .