Have changed my mind towards paid test simulators after subscribing to CCNP Routing and Switching (TSHOOT) mock tests on nwexam.
Boy!!! They are so challenging that they make me sweat. With so many 300-135 questions to practice and in a different manner every time, it gave my brains a sort of workout everyday.
I cleared Troubleshooting and Maintaining Cisco IP Networks recently with flying score.