Sturdy, nothing has broken and I have gone on trail rides and jumping. The shock is great and the tires have a lot of traction on all surfaces. The brakes work great every time even when the bike is upside down and I do a brake check, the hydraulic brakes work every time. I have been riding it for almost 3 months even during the winter and it works in all weather conditions and on all surface from trails to roads to jumping.
I would rather the color was different but I'm getting used to it and once I got a new black seat, black grips, and black pedals it looks much better. The original grips are white so they attract a lot of dirt and they move around a lot but GT sells black lock on grips and they work great and don't slide at all. Also the paint on the cranks wears off a lot and the bare metal is already showin but it doesn't really matter because the color isn't great.
Overall the GT Ruckus DJ is a great bike because it is durable, reliable, and great for just about any kind of riding. You can ride long distances with it too, I ride it for miles at a time all over during the weekends and it is comfortable and I don't have to worry about anything breaking or needing any tuning. I recommend this bike to anyone who does jumping, trail riding, or long bike rides. This is a great bike.