This grill cover works perfectly with the XL Smoker, I bought the official one because I was concerned that a generic cover would snag/catch/rub or not fit well with the chimney. The cover feels sturdy and attaches well, the real test will be over the winter period, however!
The only thing that could be better is some arrangement for the winding handle that raises/lowers the coal tray - it's fine but I feel like the single point of pressure on the cover from the handle may cause issues down the line