I really like the waist articulation. Posing him is more dynamic and for play it’s fun. But keep in mind that the waist gear function can squeak if it’s a bit dusty or played with too much.
All in all I really recommend the set, it’s great!
I have the set (my mom bought it for me when it came out), and I definitely recommend it if you can find it for around or below $30 USD. The waist gear is, as Rons_oc said, a good addition, and with a pretty low level of maintenance the squeak can be eliminated (dust it every once in a while, don’t abuse it).
The connection itself is really sturdy because it’s one of those one-time connections, where you snap it together the first time and then don’t take it out.
the waist gimmick honestly works pretty well, the copies i own dont tend to squeak that much…
also ye i would get umarak, he is probably my favourite G2 set!