I'm in the process of a complete reinstall in order to back up to version 10.2.77. I have a 50MB internet connection, (current wireless speed test 30MB/sec) but today 500Kb/sec is the best I can get with iFly?
If you're updating an iFly unit, you might see better speeds with iFly Connect than the onboard wifi.
The reinstall of 10.2.77 was for my Samsung Tab A. It's complete now and the jerkyness issue is resolved. I believe iFly connect is only for use with Windows, and it is very usefull for updating the iFly unit's SD card.