I use it every day for early morning deliveries. It has worked great so far and is securely attached to the roof. I don't go faster than about 35 with it on the roof, but it seems like it sticks at higher speeds. Love the switch and the way it lights up to show it's on. The only reason I don't give this 5 stars is that the coiled cord is too short for practical use. Are there cars with a socket on the ceiling? The only reason I didn't find this bothersome was that I had a DC extension cord lying around that I could use, otherwise I would have had to buy one.
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