Absolutely nothing. Just some attitudes and widely inaccurate misconceptions held by some who "heard" bad things about the N's 25 years ago and hold them to this day without any actual experience around them. In my opinion, the Gleaner is quite easily the best machine for a custom harvester, with its superior performance in a variety of crops, reliability, strength of construction, big capacity in a compact package, ease to work on and around and to transport, and excellent resale.