I've been using the trial version in central Florida for 4 days now. I initially "thought" I had a problem with the zoom feature. But I got a quick reply from their tech support that taught me I didn't really have a problem. I must have clicked on the zoom a couple times too many without bring the square box over the radar image and I got multiple images of itself. But just right clicking and dragging the zoom over the radar image is all I needed to do to clear things up and get the zoom I wanted. The tracking feature takes some practice as the instructions note. For a weak, diffuse frontal area your tracking may be problematic. With a strong cell or front with constant movement, I think it would work pretty well. And it really is simple to use. Three clicks posting three markers on the radar, click "track" and it's done.
The program is a "freebie" (sells for $39.99 - see http://www.stormpredator.com/
) on the Weather Shop site with the purchase of any Davis weather station here http://www.weathershop.com/davis_vvue.htm
The GR is roughly twice the price.
I would like the radar images to have higher resolution, such as on The Weather Channel's Interactive Weather Map here http://www.weather.com/weather/map/interactive/?from=wxcenter_news
But it appears the resolution on both GR and the SP are the same - both constrained by the resolution from their sources. I do like the "magnify" feature of the SP because you can create a separate magnified screen and still see the overall radar image.
I would also like the base maps to have higher resolution and more information, like the names of more towns. Without adding your own base map, the base map of the SP has more information than the maps the comes with the GR. The SP help site advises:
"The CD ROM version of SP3 has more map content and better map quality than the download version of SP3. This is because the terrain base maps have been saved using a higher JPEG compression ratio to keep the download size to a manageable level. The CD ROM contains basemaps with the best quality (minimal JPEG compression) and also contains different color schemes for the base maps. Additional art and utilities also exist on the CD ROM."
I downloaded a trial of the GR. From a 30 minute comparison between the two programs, it appears the SP does at least 90% of what the GR does. The interface of the SP is not the typical windows format with the drop down menus at the top, but it is quite intuitive with a short learning curve.
What features of the GR do you prefer?