I built the Roden D.I just after it was first released. Sadly the build is now long gone, but I remember it being a breeze.

Watch the joints around the fuselage pieces in order to make sure everything fits cleanly. The cockpit is nice out of the box but benefits from the addition of seat belts. With the guns being so prominent, it's also worth adding some etched jackets and sights. Indeed those Roden decals are troublesome; lots of decal setting solution needed.
Otherwise, it's quite a lovely kit to build.
Cheers,
BC