I use the SBS along with Air Navs ACARS decoder and suite so I dont have a bias towards one company or the other.
My SBS took about 4 weeks to get up and running the way I wanted but now it is runnings it works great. I believe that the maps on radar box are better than the SBS.
Consider this though. These applications can be CPU intensive. If you have a PC with just 256mb RAM then it could struggle. Also a detailed map can clutter the screen. My SBS map is very minimalistic.
I chose the SBS over the Airnav product because of the interface between the SBS and my ADU database. This keeps my SBS database bang up to date, and with a double click on the screen it tells me if I have seen the particular aircraft before.
The Radarbox does have the advantage of being able to merge its data with the ACARS decoder to form a single data output which is rather cool.
Watch Ebay for cheap SBS1s now, because people may be upgrading to the SBS1e.
Steve
Steve