It's all alumimum, I did a walk around today. It has a wide pilot/passenger zone in contrast to the 150/152. The cargo area is roomy too. I would say the only bad thing is the non-IFR aspect. The mockup does not have a landing light, not sure why; the preliminary specs say it is intended for night vfr despite that a sport pilot is not allowed to fly at night. It has a skylight in the cargo area which helps make it bright back there. Lots of LEDs, nice panel, nice aircraft. I'd still go for a used 152, but I'm on a tight budget.