Very good radio. Touch screen programing and more features than you ever need. The only drawback is when switching models you need to re-bind the next RX every time. With cars and FE boats you are accessing the RX easily, but to reopen a sealed radio box to switch models is a PITA>
I had FSiT4's for a couple years and the ones I had did not need to rebind for each model. They remembered the receiver for each programmed model. I loved the touchscreen programming as it was very easy to find what you needed to change. However....Mine worked well for a while then I started having
various signal issues. Sometimes they were flawless and then they started acting up. (I had 2 of them) I finally gave up and bought a Hitec. It just works...
Flysky has come out with a newer version so I don't know whether that one is any better or not.