I have one...
I have one in my RV4. I do not have any sound deadening or insulation, so my 4 is very loud! With the squelch set at max, I would still occasionally get a hot mic on takeoff. A few months ago, I installed the leather mic covers (from Spruce). I no longer have a problem.
I like the idea of two in one but unless, you do not have the panel space, you can?t afford an intercom, or you are trying to save weight (my case), I would install a dedicated intercom.
Unrelated: My antenna cable occasionally comes unplugged from the back of the radio. It?s not hard to plug it back up, but I must be on the ground to do it.
I am not bashing the Icom and have no plans to change mine now. Just an opinion from a fellow consumer.