I'm getting excellent results with the update. The occasional miss, but I attribute that to not pressing the button squarely.

I'm still not used to the flat buttons, and push Exit for Info, and Prev Channel and Mute I have to think about before I press them, but this is no doubt do to many years using the MX-800 layout.

Even though I think the buttons are positioned well on the 900, I think differentiation in size and feel would be helpful. That being said, I'm sure I'll enjoy it much more in a few months once I've used it daily.

So, I haven't tried any RF, but I doubt that will be a problem.

I think that I haven't had a misfire, other than an improper button push, since the latest update.

FYI !!!