Definitely as big as a 1/100 kit! There's just enough detail to keep it from looking bland, while still being a decently simple build. Plenty of opportunity for painting and other customization on such a large and brutal canvas!
Downside: quite limited articulation. The feet have some pretty close collision points with the inside of the shins, ...
This was my first true MG kit, and it builds like a slightly better HG. Articulation is solid and them big old feet give it a stable stance underneath that chunky booster pack. Solid solid 4/5, nothing super special, but enjoyable nonetheless!