My FIL has a BIG GREEN EGG too. His biggest complaint is the felt gasket between top and bottom. When it gets cold, the gasket works like glue to hold everything together. A friend who has a BGE rolls his smoker and its cart into his home to warm up before he can use it.
I have a copy of the EGG. It called a King Griller and I got it for a fraction of the BGE price from WalMart. So far it has served me for about ten years and its gasket works much better than the EGG.