To be honest we had the opposite experience as thought we were really rushed around with a guide. Plus our guide was "training" I think and pretty soon realised from the numerous books I've read I knew more than she did!
It's a place for contemplation not a tourist attraction.
I suppose it's just luck, like anything you have bad and good experiences. I would not fault the guide we had. She knew everything and let us stay as long as we wanted even though the place had shut and we were the last to leave on the whole site, it was pitch black outside not another person in sight. The only thing that was bad on our tour was the fucking ignorant disrespectful wankers in our party laughing and joking and asking stupid questions. They even fucked off half way through.
Another thing that was sad to see was all the graffiti from visitors by the cell where the prisoner carved/drew a picture of Jesus.
It might have been mentioned already but I recommend a book called Eyewitness Auschwitz by Filip Müller if anyone hasn't read it.
http://www.amazon.co.uk/Eyewitness-...2714/ref=sr_1_1?ie=UTF8&qid=1300745831&sr=8-1