Relaxed building took about 4 hours and 30 minutes.
Brick quality: Sembo uses GoBricks, so of course the quality is perfect, great colours and clutch.
Design: this thing doesn't just look great with its perfectly matched colours, it's a solid toy that is great for both play&display. For this price, I believe Sluban now has a solid competition in mechs genre. There were some one-pin connections here and there, but none is essential for stability, not a single piece fell off during its photo-shoot (and I admit even Sluban can't always achieve this). Hands are just a masterpiece, so many cool posing ideas you can have with them! Legs have additional supports, ratchet joints are used for both arms and legs.
Stickers/prints: another great improvement for Sembo - not a single sticker in this set! The building process was much more enjoyable.