I have a Yaesu 750. In actuality, the NAV function works very well. I bought mine after losing my radios and would not fly without a handheld ever again.
I do think the menu system is a little complicated. I am so used to not having to read over instruction books when it comes to technology devices. This handheld is definitely not intuitive in regard to operation.
You are not alone.
I think that it’s fair to say that Apple was not in charge of designing the nav and memory interface of either the Yaesu or Icom. It becomes clearer when one realizes that the programming of memory is reminiscent of the 1980s/early 1990s.
It took me about two hours to figure out how the Icom memory works.
If the Icom can be programmed, as I suspect, via the Android/iOS app and the Bluetooth functionality, that is great, but I have not played with the app enough to know for sure.
And of course instructions for the app are rudimentary at best. In fairness, the radio and the app have just been released, and are not even available outside the US and Canada, and perhaps parts of Asia, so perhaps we can hope for more detail, but I’m not holding my breath
I can tell you that Icom US sales people have not got a great grasp of how the radio works. Asked whether I could use it with Bluetooth earbuds (in my case, Jaybirds), I was told to call their technicians. I just decided to go with it, and sure enough the radio works fine with Jaybirds.
This is very useful preflight. As someone who lives close to LaGuardia, and who is learning ATC jargon and pace, it’s also quite cool that I can put the radio on my windowsill and listen to the traffic wherever I want in the room, and without disturbing my partner
P.S. For those who read the Icom manual and wonder why the radio supports both Bluetooth and Bluetooth LE, the reason is that communication between the radio and the app, hosted by your Android or iOS device, happens via LE.