This thing is genius. The kind of stuff that will leave you amazed as you build it, as you go "hmmm, where is this going..." to "oooooh, I seeeee! CLEVER!" to "OMFG NO WAY."
The leg mechanism (you can fully retract it, like in the movies), the internal gadgets that R2-D2 has, how the design of every detail in the original R2-D2 is addressed in this smaller—but quite huge! Measures over 12 inches (31 cm) high and 7 inches (18 cm) wide—version... all of it makes for an extremely good set. The best of this guide. You will love it.