2.5K USD and you need to build or rely on another piece of technology to use it?
I'm ok with kit builders and people trying to revive the good old days of Heathkit but this is just stupid!
Flex may have a great product but it is an incomplete one! You always need something else other than the box you buy and for the price it sells for, it should at least come with a small, 7", 100USD tablet that you can use to interface with the "radio".