I have been a life long Weber grill user.  This is the first that I have had an issue with.  The bottom of the kettle was out of round and the lid did not seal properly.  After contacting customer service, and sending various pictures.  I was sent a replacement bottom for the kettle that resolved the problem.  I was a bit surprised that I had to disassemble various pieces from the original bottom such as the ash catcher and ash cleanout devise.  Not a tremendous task but because the unit had been used it was dirty from ash and cooking grease a a bit of a challenge to handle without creating other messes.  Customer service was fine to deal with but it would have been nice to get all of the needed parts sub assembled as it was not my fault the original slipped through quality control.
Now with the replacement kettle bottom the grill preforms as I would have expected and it no longer drips cooking grease on my paver brick Lanai