I recently bought a Lotus 99T from AA, the chassis is plastic and I have to say, despite it looks cheaper than die cast and resin, well it looks more durable over time, remember zinc cancer?
The only real issue...well they've kept a quite high price.
Forgot to take photos of mine but this model is EXTREMELY fragile, it came broken during shipment, luckly I was able to fix it quite easily.
I messed up a bit with the rear wing, excessive loctite super attak (or crazy glue, the name is different) made a mess, and I scratched a little bit that part in order to remove the excessive glue, on the plus side it's not so visible, unless you pay attention and the model looks stunning anyway.