Just passed the 70-461 today so wanted to add my 2 cents.

I actually didn't find it as bad but then again I was expecting it to be murder after reading OP's comments. I wouldn't say that the questions in the Training Toolkit CS are useless but the exam questions are definitely harder. What I would do is read the book carefully, which is great by the way, do all the exercises and practice questions and then do the practice exam since it's more of a warmup than an actual exam simulation.

I can't say anymore because of the Terms and Conditions signed but I would say that it's challenging but doable.