I recently "upgraded" from the ID-880H to the shiny new ID-4100A from ICOM. Here are some of my first impressions of the radio, pros and cons - it might be considered instructive that I found things I didn't like about the radio at a higher rate than I found things I liked about it. I'll follow up with more as I get more familiar with the radio. Any other good first impressions to share? Pros: LCD has more information, being a dot matrix More graphical menus are easier to follow Internal GPS, Location-Aware repeater lists (this is one of the best things ever) Entering data works just like the Garmin GNS-430 aircraft GPS! That was a nice touch. Cons: New menu system is haphazard - three different buttons can activate three different menu systems (Menu key, Pushing the tuning knob, and the "quick" menu button). I see the utility in this but it will take some learning They got rid of callsign lists! This is a big deal. Now you can only get to a pre-programmed UR callsign if it is in the recents list. Otherwise you have to re-enter it manually. LCD is very slow, and I can only imagine how much slower it will be when it gets cold. The contrast is terrible, and the "White" and "Blue" color selections may as well both be blue. They really cheaped out on the display quality - not something you like to see on a $400+ radio. The squelch circuit in FM mode leaves a LOT to be desired. It opens when you let go of PTT, it opens even when you have receive tones enabled, and it opens when you drop a hat.