We already love our iWay500, but were having trouble getting good GPS locks. Sometimes, cloudy weather or nearby trees seemed to make our GPS lose position and our position accuracy would drop to 400 feet EPE. Attached this to the iWay and mounted it on the window near a clear spot (not near the wipers or near the tinting) and, wow, it picked up 7 satellites within seconds and had an accuracy of 40 feet EPE! Well worth the price.

I live in a very rural area of florida. I deliver meals and purchased the antenna to help my IWay500 find addresses quicker, especially on cloudy days. The antenna works 'okay'. I still have problems on rainy/cloudy days but I think they have been somewhat reduced. Even though I don't think this antenna makes drastic improvements, I still use it all the time.