Let me try to make things a little bit more clear.
Reach software is defined by two numbers: the image version and the app version.
For the first ReachView the latest are 1.2 and 0.4.9 correspondingly. However, the image we have posted contains the app version 0.0.3, just because it was the newest at the time.
For the beta, the image version is 2.0 and the current app is 2.1.2.
Updating on the slow connection
The first RV has an update system that is far from perfect and the amount of data to download when you update from 0.0.3 to 0.4.9 is rather big. It’s not as big as a whole image, however.
The new beta has a much more advanced update system, it will show you new version availability, progress and such. Moreover, the difference between the default app version beta image app version and the current 2.1.2 is way smaller than it is in the non-beta release, so updating on slow connection will be easier.
Overall, I would recommend using the beta any day. It’s still lacking some features, but mostly is quite stable and much more pleasant to use.