I agree with the earlier poster who stated others may be being a tad too harsh. It is certainly true this is not a professionally laser-scanned, full-AMS-featured track. I adore the Kunos Nordschleife, and how true-to-life it is. However, this version is a a fairly decent representation of this jewel of a race track. The bumps, raises, and dips may not all be there within a millimeter of their real-world counterparts, but considering the majority of individuals (myself included, for now) whom have never set foot on the circuit, much less drive a spirited lap, will never know the difference.
The textures of this version are a little rough, but overall I don't mind them. Track-side items such as fans, marshal stands, and safety vehicles look fine when moving. As others have stated, rubber build-up and a lot of the other AMS features we've come to expect are certainly missing though. This may be a bit of a detractor for those seeking to run a full VLN or 24-hour enduro.
It's clear we will never get this circuit from Reiza or Patrick, so I say it's good a good enough conversion to tide me over until an official version does come along. Others are certainly entitled to their opinions.
Thank you for the conversion and upload!