Overall quality firebox, burners and general construction.  The annoyances that shouldn't be..... given the cost of this model: lights on the handle - junk, stopped working in under 2 years, on/off switch for illuminated knobs - junk, stopped working after about 3-4 years, they sent a replacement (after much arm twisting) and it stopped working after about a year, the burner knobs - this expensive a grill and from day 1 have had about 1/2" of play in all burner knobs; talked to Weber rep, he told me to put toothpicks in the knobs to eliminate the play - REALLY, for a grill that cost as much as many folks first car - this is the solution?!  I think for the price charged, Weber should do better - step up to the plate and give the customer the value they're paying for!  These nickel and dime shortcomings really leave a bad taste overall!