This is my very first Gunpla and I have some opinions :D
I loved building it, it's a very cool puzzle and once I got in the flow, it was great.
The arms are kinda bad, one of them doesn't extend fully and I don't understand why as it's identical to the other. The hands are awful. Everything else is great, the legs in particular are incredible.
Panel lining with cheap acrylic paint diluted with water and dish soap works very well, and since the paint doesn't adhere completely even when dry, it's very easy to clean.
It's... flimsy. Very flimsy. I don't know if it's this model in particular or if all Gunpla are like this but posing it is more stressful than fun. The arms and the shoulder armor in particular pop off constantly, and I had to glue the crest because it kept flying off.
It looks great! As far as the parts popping off, that is how some models are. Fortunately it's less and less common the newer the model is. It also seems that the more complicated the model, the less it likes to stay together when posing.
Thanks !
The worst offenders are the shoulders and the hands, the rest is actually fine.