Very well built with heavy gauge stainless steel lid.  Large cooking surface.  Grill lights easily and heats up quickly.  One of the most important elements is even cooking, and so far this has been great.  I'm glad I got the 335 with the underneath storage.  I didn't have it on my recently sold Spirit and I had missed it.  Overall, I haven't had it long enough to find any issues, but this is my 2nd Genesis and I don't regret the purchase at all.