Massive, and well thought out method for assembly. I can't say I expect anything less from almost 30 years of playing with/assembling Lego "toys". I won't call this educational in the strictest sense, but it is definitely more fuel for the imagination. The bottom, with good reason, isn't truly finished, and the figures are not a great fit in the compartment, but to be scale.....no way.
This is not a Lego set for the very young, but would be good for most mature pre-teens, and mid-teen Lego artisans. Younger than 10? Highly rare for a child under the age of 10 to have the patience and attention to detail that this model demands. If you are under 10 and did this, I commend you! If your child under 10 did this; you are to be commended along with that child!
This was one of only a couple of Lego models I have built over the years that gave me sheer joy at every step. I hoped, and waited, and finally got what I longed for: Executor. Before you ask: I am 34. This took me nearly 20 hours, spread out, on a 6' x 6' table. I didn't rush, you probably shouldn't either, so expect to lose the use of the table for a while. Keep cats, and other acrobatic pets or small children at bay: there are many, many, small pieces. Make sure your surface (floor and table) are high contrast colors, like light blue, dark brown, or similar, so the pieces don't blend in.
Best of luck, and enjoy!