There are several errors in the book, and some wrong cross referrals. Which means they say to look in a particulair chapter to find specific information, and after re-reading the chapter several times you cannot find to what the referred.
Furthermore I think they don't go deep enough on some subjects. There could be more challenging Step-by-steps then provided in the book, like more step-by-steps for problems you may encounter real-world.
So why is New Riders still in my Top 5?
A very positive thing about New Riders books is that they are easy to read, and make difficult and technical problems more consumable for the less experienced users. Especially users whose native language isn't English (like me :-D).
User who still think they need some extra information on this particulair exam, I would recommend Windows 2000 Network Infrastructure Administration: Study Guide with ISBN 0782129498.
70-216 is one of, if not the most, tough exam in the MCSE track, so I think you'll need it.
My feelings about the prep books on the market for this exam leave me a bit torn. Seems reasonable that the toughest exam would cause a writer to generate a weak book, then again, wouldn't you expect the publisher to put their absolute strongest writing up against the toughest MCSE exam? I used 2 other books to prep for this exam, Exam Cram for 216, and belive it or not, Exam Cram for TCP/IP, since both the Newriders 216 book and the Exam Cram 216 book refer you to other works when it comes to covering subnetting. I guess they felt that previous books covered that material so well, that to try again would offend the gods.
My point is this: this is a tough exam, and all of the prep companies have sold us short. This is the thinnest book in each publisher's series. You might need more that one vendor's prep book for this test. Using 2 other books got me through it first time. My coworker needed 2 tries to pass. Best of luck to you. Hope this helps you in your efforts.