I won't disagree with the criticisms leveled by RAS56, and I have noticed with irritation while waiting for tow the two rubber duckie antenna sticking up in my field of view (even though I focus beyond them in flight) are unsightly. But after only three flights with Power FLARM I have to say it has alerted three times on traffic I had not seen, one of which could well have been a collision threat. That is to say, the glider was off to my right at my altitude and apparently decided to try my thermal. The PF got my attention and I found the threat in mere seconds and was able to turn out of the way. We'll never know if I would have seen it without the PF, of course, but I'm happy with the alert. That said, I'd still like to see the antenna put somewhere other than the to of my glareshield.