quick CBs
cloud bursts??
that it's not a real time nor near-real-time display. Something like 15 minutes or more lag.
Not real time, but only a short delay. You can animate the radar screen, and when you watch the animation in the lower left screen you can see the time delay, starts out at approximately 25-30 minutes and scrolls to 3-5 minutes.
It worked very well for my ride home from TN, knew when to stop, when I could take off my rain gear and when I needed to get the heck off the road - lightning dancing around the mountain tops!
I was driving in in high 90's sun, torrential downpours, high winds, high 90's sun blast furnace, torrential downpours yada yada yada ...
At one stop for fuel the temperature was 101.
And I could see when the heavy stuff was over (no more red & yellow) so that I could get back on the road.
I'll see if I can catch it on video, but I have to wait for the weather to come first.
Is it current?
Is it an overlay over the nav map or do you have to switch from one to the other?
What's the monthly charge for the addition?
And anything else that seems important....
Fairly current, more so then if you stopped and looked for a TV

The radar is overlay-ed on the nav screen. You can see on the nav and on a separate weather screen (with other options)
I started with the basic for $10, it sucked and had no NEXRAD. I now have the "fisherman" which is $30 @ month. I'll keep it for the season and turn it off when the bike goes up on the jack for the season.
The 478 with the NT software has "new" clutter on the screen, as you zoom out there is an icon for every airport, from the smallest to the largest, so many that the screen is hidden by little jets
The picture below is on the 80 range, which shows much more then 80 miles, the lowest airplane is near the bottom of Maryland, the red lines in the middle are various tracks and routes around my home (central New Jersey) This is on my list of concerns with tech support.
I would like to see the best of both the 550 and the 478 combined. The 550 is OK, for someone that has not had a more in depth unit, but for me it is lacking. I can pretty much do the data entry with only an occasional glance, with the 550 you have to look at the screen to enter data.