I had a DC16 a while back and yes it's an incredible system, and one that served me very well flying, however going Jeti has a few negative points
- Upgrades aren't free, modules aren't free, getting it to do the basic things found on other radios isn't free. You get 50 euros worth of credit to spend on the Jeti store, but that buys you three cheaper modules.
- Receivers start at £60 each for a 6 channel- It is more than you'd ever need in a boat, period. They're aimed at the highest level pro model aircraft and heli flyers that are in comps or shows, so dropping that much cash on a radio for a boat is, in my opinion, senseless.
Personally, now that I've stopped flying and have gone back to boats I've now gone with a Taranis. Is you're after a tray radio, go for a Horus. The Taranis is 32 channel and is almost as good in quality (hall effect gimbals are available, and I have them), and is leagues more programmable than the Jeti. Upgrades are open source and free, and a 16 channel Rx will set you back half a 6 channel Jeti.
Of course, the one thing the Jeti can do for you that the Taranis can't is play Tetris....