I've owned one for a few days now and I'm still fumbling my way through it. It's a lot of radio...
A couple of observations that may help you make up your mind though... If you're planning to run it "full featured", you're going to have to do it with the face plate off. The data and GPS jacks can't be utilized with the faceplate in place because the jacks are located on the front of the radio rather than the back. Same for the mic jack. I can't plug my Heil mic in with the faceplate installed.
You may not think the GPS is a useable feature using the radio as a base, but it's pretty cool using it with D-Star. It will give you a compass arrow to point your antenna at the repeater, plus give you a distance to the contact station, even through a gateway.
So far I haven't been able to program "decoding" tones through the menu system. There may be a way to do it, but I quit searching for it and just ordered the RT systems software. Memories are a little different than I'm used to with only 20 memory channels, but it has like 60 memory banks. It's just something I have to get used to.
Other than that, it's easy to use, easy to program and gets great audio reports, even with the stock mic. I'm not sure that it's worth double the price of my FT-8800 (and that's for the base radio, before D-Star), but I have no regrets so far.