I hand-painted the entire Cluster Gundam.
I used a dark color for the armor and a dark brown for the internal frame, then added gold and red decals for a richer look. I think it turned out pretty well, if I do say so myself.
The body has excellent proportions, regardless of the face.
You can't tell because it's fully painted, but I think it's a good kit with detailed color separation that makes it easy to assemble. The water-slide decals are just right, not too many and not too few.

Cluster Gundam, fully painted with brushes. | マサカズ's Gunpla works