I love mine. I was a batch 4 I think. I had a keyboard issue that framework took care of very quickly.
In terms of durability, I carry it to and from work everyday, and have had no issues.
In terms of fit and finish, it isn't perfect. The mousepad spacers are a little uneven.
Other than that everything has been working fine, gpu, number pad, etc. I am running linux on it with no issues.
The 16 is heavier than the 13, but it isn't too heavy to use on your lap. I generally carry it in a messenger bag, so the bulk doesn't bother me too much.