I've had an 8800 in my truck for 3-4 years. It's a tough little radio. Probably the best feature it has for a mobile install is that the mic plugs in to the face plate itself, so in a remote install you don't have to string a mic cable through the vehicle to the driver's seat.
The downsides IMO are menu buttons that aren't lit making it impossible to see in the dark and the menu system. The menu system is a bit chaotic. I found it much easier to program with a cable and software. Transmit audio on the 8800 is "okay", but far from "loud".
I also have an Icom IC-2820 and a Kenwood TMV-71A. The 2820's menu is even worse than the 8800's and I found it so difficult to program that I spent $50 on the RT Systems software. Audio on the 2820 is "soft" as well, but it's buttons DO light up making it easier to make changes in low light.
The TMV-71A on the other hand is a dream. Dead simple and one of the only radios that I've never hooked up to a computer to program. The audio on the 71 is STRONG. It's by far my favorite of the three. The only downside that comes to mind is the fact that the mic cable plugs into the radio rather than the face, so you need to string another cable to remote mount it.