I get the military screen, it's just not pleasant to look at or deal with. Three squads is fine, but once you have to start scrolling to access your squads and/or months...it kind of pushes the limits of what I want to deal with strictly through the keyboard. That's why DT is such a great tool for a lot of DF. It adds the things DF lacks in terms of functionality: full mouse support and quickly moving between information fields.
The whole military screen has mouse support actually. Anyting is easily clickable as if it was a windows interface and it works great. I love it.
I can't wait for other screens to get updated for mouse support in the same way.. the shortcuts are confusing me (I'm new).
But on topic, I used DT with varying results. First 2010 game it worked well enough, had no issues other than dead dwarfs not disappearing from the list which was slightly confusing.
After a while though, all but 1 dwarfs disappeared from the list and wouldn't load anymore. DT only ever loaded that single dwarf and found nothing else, so it lost it's use for that game.
Another 2010 game I started yesterday, it didn't work at all for some reason. It just said it couldn't connect to DF, saying something about no fortress beeing loaded (but I was ingame) eventhough it worked fine the day before. Not sure what went wrong there...
But still, great tool, it definitely helps a lot with managing things. In DF I have to go look for dwarves all over the place and check their skills and set things and it takes a lot of time. In DT I have everything I need in one place, and that's just great.