After reading the previous post of those that had success there may be a common thread. I have a couple friends that have had them in place for an eternity, On the other hand like Glen, myself, and other post I have read, they don't stay on. The two I know of have flat glass winhows. One is on a Jeep, the other is on a pickup. As this post:</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">At the risk of sounding different, I've used a dual band glass mount for 2 years on my F 150 pickup[/QUOTE]<span id='postcolor'> A pickup probably with a flat glass. May or may not be the answer, but the only ones I know that have lasted a long time were on a flat glass.