640-460 Transcender

Just starting using the Transcender exam engine on a 30 day trial, and I've noticed a few terms which aren't mentioned in the official Cisco press book such as companding, Cisco access digital trunk gateway and analogue trunk gateway. So far I've used the book, nuggets, gns3 and some hardware as study prep material but thinking now it isn't enough.
Comments
I used the full version of the CCNA-V Selftest pack (same as Transcender, just rebadged and cheaper), found it close to the real exam.
For digital trunk gateway, think E1/T1.
For analogue trunk gateway, think FXO/FXS.
hxxp://www.selftestsoftware.com/
Like the QOS mentioned above there is not much detail in the official books but looking as some test questions you get the feeling of not knowing what they are talking about. I guess as the cert matures and the books get reprinted most of this will get sorted but it doesn't do us any good who are studying now. There some shocking errors in the security book, makes me think the books have been rushed out even without being proof read.
The book I bought has some suppllemental info on QOS on the attached CD which helped a lot.
Previous : Passed Configuring Microsoft Office SharePoint Server 2007 (70-630)
Currently : EIGRP & OSPF
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Thanks mike this is exactly what I'm trying to say. Ok so yeh you shouldn't rely on one source as everybody knows, this is why I going to research some more on the Cisco site. But I can't help feeling a bit miffed at having paid for and read the book twice over plus making notes along the way to find I still don't know what they are talking about in some of the questions being asked.
The Cisco study guide also includes an Exam Sim, though I didn't think much of it.
I also used the Exam Cram CCNA-Voice book, the Transcender links for wrong answers, and "other" exam sim sources. If you do a search you can find these sources which also have 10-20 questions in their evaluation simulators.
As for QoS, no there wasn't much in the book, and as it's now been 6 months since the exam don't have a good recollection of it.