This grill has great performance for roasts and steaks.  I also use the rotisserie frequently.  In Northern California, we have a wet and relatively cold winter.  I have had to leave it out in the elements without the cover because rats were finding the covered grill a comfortable place to build a nest.  I have had no issues with corrosion. 

I did have a friend crank on the burner control knob without pressing it in resulting in the plastic breaking.  I think that might be the only piece of plastic on the entire fabulous grill.  I am now on this website looking for a replacement burner control knob.